最新娱乐场开户,精彩彩票,贝斯特全球最豪华最新版

共找到 7 個相關產品馬可波羅 > 推土機> 推土機山推180參數(shù)

類目：

推土機 (3)
二手工程機械 (1)
裝載機/鏟車 (1)
其他工程機械配件 (1)

品質商家熱力排行

全國

<div   id="gn8cdul5"   class="s_product_item">

<div   id="gn8cdul5"   class="s_product_content s_product_content_r">
<div   id="gn8cdul5"   class="s_product_title" score="32" pro_score="0">
<a target="_blank" class="plistk f14" data-num="1" data-flag="0" href="http://www.fhjczf.com/product-detail/100063354974.html">低價經銷06年移山180 二手推土機 山推
</a>

</div>
<div   id="gn8cdul5"   class="s_product_info">


<ul class="s_product_parameter">
<li id="gn8cdul5"    class="new_li">
<a href="http://www.fhjczf.com/product-detail/100063354974.html" data-num="9"  data-flag="0" target="_blank">
<table class="new_list">

<tr>
<td class="td_1"><div>品牌/型號：</div></td>
<td class="td_2"><div>天津移山/天津移山180</div></td>

<td class="td_1"><div>所屬分類：</div></td><td class="td_2"><div></div></td>

</tr>
<tr>

<td class="td_1"><div>產品關鍵詞：</div></td><td class="td_2"><div>推土機山推180參數(shù)</div></td>
<td class="td_1"><div>最小采購量：</div></td><td class="td_2"><div></div></td>

</tr>
<tr>


</tr>

</table>
</a>
</li>
</ul>


<div   id="gn8cdul5"   class="s_product_contact plistk">
[遼寧營口] <a  data-num="3"  data-flag="0" target="_blank">
營口天富制造有限公司
</a>

<span id="gn8cdul5"    class="s_product_line">|</span>
<a  data-num="3"  data-flag="0" target="_blank">
路面抹光機/抹平機,其他工程機械配件,推土機
</a>
<span id="gn8cdul5"    class="s_product_line">|</span>
<a   data-num="4" data-flag="0" rel="nofollow" data-pstate="0" data-conurl="http://connie010.cn.makepolo.com/contact_us.html?proid=100063354974">
查看聯(lián)系方式
</a>
</div>
</div>
<ul class="s_product_param">

<li id="gn8cdul5"    class="plistk" id="">
報價:面議</li>

<li id="gn8cdul5"    class="plistk" id="xu">
累計詢盤:4次</li>
<li id="fenlei"><a onclick="stat2_rf('36be0e3f215b480d98f15fce82e68fd3','pc_search_xp_1_show')" href="http://www.fhjczf.com/product-detail/100063354974.html#inquiryPop" target="_blank" rel="nofollow">點此詢價</a></li>
</ul>
<div   id="gn8cdul5"   class="clear"></div>
<div   id="gn8cdul5"   class="value_add_service_con">
<ul>
</ul>
</div>
</div>
<div   id="gn8cdul5"   class="s_product_pic">
<div   id="gn8cdul5"   class="s_product_pic_box"><a href="http://www.fhjczf.com/product-detail/100063354974.html" target="_blank" data-num="7" data-flag="0" title="低價經銷06年移山180 二手推土機 山推"><img src="http://img5.makepolo.cn/images/formals/img/product/367/218/825700da342ecb8f6bcf5eca48a9cb08.jpg~tplv-izbs7asbod-1:280:210.image" onload="if(this.height>this.width*0.75){if(this.height>88){this.height=88;} }else{if(this.width>118){this.width=118;} }" alt="低價經銷06年移山180 二手推土機 山推"  onerror="javascript:this.src='http://jic.makepolo.cn/caigou/new/images/none.jpg'" /></a></div>
</div>
</div>

<div   id="gn8cdul5"   class="s_product_item">

<div   id="gn8cdul5"   class="s_product_content s_product_content_r">
<div   id="gn8cdul5"   class="s_product_title" score="24" pro_score="0">
<a target="_blank" class="plistk f14" data-num="1" data-flag="0" href="http://www.fhjczf.com/product-detail/100081950896.html">二手宣化推土機價格 08年二手推土機轉讓
</a>

</div>
<div   id="gn8cdul5"   class="s_product_info">


<ul class="s_product_parameter">
<li id="gn8cdul5"    class="new_li">
<a href="http://www.fhjczf.com/product-detail/100081950896.html" data-num="9"  data-flag="0" target="_blank">
<table class="new_list">

<tr>
<td class="td_1"><div>品牌/型號：</div></td>
<td class="td_2"><div>宣化、山推等/140/160/165/180</div></td>
<td class="td_1"><div>新舊程度：</div></td>
<td class="td_2"><div>8成新</div></td>


</tr>
<tr>
<td class="td_1"><div>設備所在地：</div></td>
<td class="td_2"><div>上海</div></td>
<td class="td_1"><div>類型：</div></td>
<td class="td_2"><div>鏟土運輸機械</div></td>


</tr>
<tr>
<td class="td_1"><div>自動化程度：</div></td>
<td class="td_2"><div>半自動</div></td>

<td class="td_1"><div>所屬分類：</div></td><td class="td_2"><div></div></td>

</tr>

</table>
</a>
</li>
</ul>


<div   id="gn8cdul5"   class="s_product_contact plistk">
[上海] <a  data-num="3"  data-flag="0" target="_blank">
上海玉凡工貿有限公司
</a>

<span id="gn8cdul5"    class="s_product_line">|</span>
<a  data-num="3"  data-flag="0" target="_blank">
二手工程機械,專業(yè)技術服務,叉車/工業(yè)車輛,
</a>
<span id="gn8cdul5"    class="s_product_line">|</span>
<a   data-num="4" data-flag="0" rel="nofollow" data-pstate="0" data-conurl="http://chxmaoyi.cn.makepolo.com/contact_us.html?proid=100081950896">
查看聯(lián)系方式
</a>
</div>
</div>
<ul class="s_product_param">

<li id="gn8cdul5"    class="plistk" id="">
報價:面議</li>

<li id="gn8cdul5"    class="plistk" id="xu">
累計詢盤:1次</li>
<li id="fenlei"><a onclick="stat2_rf('36be0e3f215b480d98f15fce82e68fd3','pc_search_xp_1_show')" href="http://www.fhjczf.com/product-detail/100081950896.html#inquiryPop" target="_blank" rel="nofollow">點此詢價</a></li>
</ul>
<div   id="gn8cdul5"   class="clear"></div>
<div   id="gn8cdul5"   class="value_add_service_con">
<ul>
</ul>
</div>
</div>
<div   id="gn8cdul5"   class="s_product_pic">
<div   id="gn8cdul5"   class="s_product_pic_box"><a href="http://www.fhjczf.com/product-detail/100081950896.html" target="_blank" data-num="7" data-flag="0" title="二手宣化推土機價格 08年二手推土機轉讓"><img src="http://img5.makepolo.cn/images/formals/img/product/221/763/b8754d3394610afdcf40b5aa680e4682.jpg~tplv-izbs7asbod-1:280:210.image" onload="if(this.height>this.width*0.75){if(this.height>88){this.height=88;} }else{if(this.width>118){this.width=118;} }" alt="二手宣化推土機價格 08年二手推土機轉讓"  onerror="javascript:this.src='http://jic.makepolo.cn/caigou/new/images/none.jpg'" /></a></div>
</div>
</div>

<div   id="gn8cdul5"   class="s_product_item">

<div   id="gn8cdul5"   class="s_product_content s_product_content_r">
<div   id="gn8cdul5"   class="s_product_title" score="24" pro_score="0">
<a target="_blank" class="plistk f14" data-num="1" data-flag="0" href="http://www.fhjczf.com/product-detail/100203496552.html">推土機刀角刀片
</a>

</div>
<div   id="gn8cdul5"   class="s_product_info">


<ul class="s_product_parameter">
<li id="gn8cdul5"    class="new_li">
<a href="http://www.fhjczf.com/product-detail/100203496552.html" data-num="9"  data-flag="0" target="_blank">
<table class="new_list">

<tr>
<td class="td_1"><div>品牌/型號：</div></td>
<td class="td_2"><div>山推/130、160、180等</div></td>

<td class="td_1"><div>所屬分類：</div></td><td class="td_2"><div></div></td>

</tr>
<tr>

<td class="td_1"><div>產品關鍵詞：</div></td><td class="td_2"><div>推土機山推180參數(shù)</div></td>
<td class="td_1"><div>最小采購量：</div></td><td class="td_2"><div></div></td>

</tr>
<tr>


</tr>

</table>
</a>
</li>
</ul>


<div   id="gn8cdul5"   class="s_product_contact plistk">
[山東濟寧] <a  data-num="3"  data-flag="0" target="_blank">
濟寧達發(fā)工程機械有限公司
</a>

<span id="gn8cdul5"    class="s_product_line">|</span>
<a  data-num="3"  data-flag="0" target="_blank">
液壓油/傳動油,裝載機/鏟車,分離器,其他工程
</a>
<span id="gn8cdul5"    class="s_product_line">|</span>
<a   data-num="4" data-flag="0" rel="nofollow" data-pstate="0" data-conurl="http://jndfgcjx.cn.makepolo.com/contact_us.html?proid=100203496552">
查看聯(lián)系方式
</a>
</div>
</div>
<ul class="s_product_param">

<li id="gn8cdul5"    class="plistk" id="">
報價:面議</li>
<li id="fenlei"><a onclick="stat2_rf('36be0e3f215b480d98f15fce82e68fd3','pc_search_xp_1_show')" href="http://www.fhjczf.com/product-detail/100203496552.html#inquiryPop" target="_blank" rel="nofollow">點此詢價</a></li>
</ul>
<div   id="gn8cdul5"   class="clear"></div>
<div   id="gn8cdul5"   class="value_add_service_con">
<ul>
</ul>
</div>
</div>
<div   id="gn8cdul5"   class="s_product_pic">
<div   id="gn8cdul5"   class="s_product_pic_box"><a href="http://www.fhjczf.com/product-detail/100203496552.html" target="_blank" data-num="7" data-flag="0" title="推土機刀角刀片"><img src="http://img2.makepolo.cn/images/formals/img/product/478/834/c52ee5d2c19c25fad4e13d258a99d1d5.jpg~tplv-1fgsepqywg-mp:280:210.image" onload="if(this.height>this.width*0.75){if(this.height>88){this.height=88;} }else{if(this.width>118){this.width=118;} }" alt="推土機刀角刀片"  onerror="javascript:this.src='http://jic.makepolo.cn/caigou/new/images/none.jpg'" /></a></div>
</div>
</div>

<div   id="gn8cdul5"   class="s_product_item">

<div   id="gn8cdul5"   class="s_product_content s_product_content_r">
<div   id="gn8cdul5"   class="s_product_title" score="24" pro_score="0">
<a target="_blank" class="plistk f14" data-num="1" data-flag="0" href="http://www.fhjczf.com/product-detail/100016746164.html">各種型號的山推配件 推土機配件 履帶總成(圖)
</a>

</div>
<div   id="gn8cdul5"   class="s_product_info">


<ul class="s_product_parameter">
<li id="gn8cdul5"    class="new_li">
<a href="http://www.fhjczf.com/product-detail/100016746164.html" data-num="9"  data-flag="0" target="_blank">
<table class="new_list">

<tr>
<td class="td_1"><div>品牌/型號：</div></td>
<td class="td_2"><div>山推/TY130\160\180\220\230\320\SD42</div></td>

<td class="td_1"><div>所屬分類：</div></td><td class="td_2"><div></div></td>

</tr>
<tr>

<td class="td_1"><div>產品關鍵詞：</div></td><td class="td_2"><div>推土機山推180參數(shù)</div></td>
<td class="td_1"><div>最小采購量：</div></td><td class="td_2"><div></div></td>

</tr>
<tr>


</tr>

</table>
</a>
</li>
</ul>


<div   id="gn8cdul5"   class="s_product_contact plistk">
[山東濟寧] <a  data-num="3"  data-flag="0" target="_blank">
濟寧市三業(yè)工程機械有限公司
</a>

<span id="gn8cdul5"    class="s_product_line">|</span>
<a  data-num="3"  data-flag="0" target="_blank">
濾芯,內燃機、發(fā)動機配件,其他工程機械配件
</a>
<span id="gn8cdul5"    class="s_product_line">|</span>
<a   data-num="4" data-flag="0" rel="nofollow" data-pstate="0" data-conurl="http://lejingsanyejx.cn.makepolo.com/contact_us.html?proid=100016746164">
查看聯(lián)系方式
</a>
</div>
</div>
<ul class="s_product_param">

<li id="gn8cdul5"    class="plistk" id="">
報價:面議</li>

<li id="gn8cdul5"    class="plistk" id="xu">
累計詢盤:1次</li>
<li id="fenlei"><a onclick="stat2_rf('36be0e3f215b480d98f15fce82e68fd3','pc_search_xp_1_show')" href="http://www.fhjczf.com/product-detail/100016746164.html#inquiryPop" target="_blank" rel="nofollow">點此詢價</a></li>
</ul>
<div   id="gn8cdul5"   class="clear"></div>
<div   id="gn8cdul5"   class="value_add_service_con">
<ul>
</ul>
</div>
</div>
<div   id="gn8cdul5"   class="s_product_pic">
<div   id="gn8cdul5"   class="s_product_pic_box"><a href="http://www.fhjczf.com/product-detail/100016746164.html" target="_blank" data-num="7" data-flag="0" title="各種型號的山推配件 推土機配件 履帶總成(圖)"><img src="http://img2.makepolo.cn/images/formals/img/product/158/855/cbbe0b27efae0b90221ee543a97fe668.jpg~tplv-1fgsepqywg-mp:280:210.image" onload="if(this.height>this.width*0.75){if(this.height>88){this.height=88;} }else{if(this.width>118){this.width=118;} }" alt="各種型號的山推配件 推土機配件 履帶總成(圖)"  onerror="javascript:this.src='http://jic.makepolo.cn/caigou/new/images/none.jpg'" /></a></div>
</div>
</div>

<div   id="gn8cdul5"   class="s_product_item">

<div   id="gn8cdul5"   class="s_product_content s_product_content_r">
<div   id="gn8cdul5"   class="s_product_title" score="22" pro_score="0">
<a target="_blank" class="plistk f14" data-num="1" data-flag="0" href="http://www.fhjczf.com/product-detail/100917584167.html">項城市租賃推土機  項城推土機出租
</a>

</div>
<div   id="gn8cdul5"   class="s_product_info">


<ul class="s_product_parameter">
<li id="gn8cdul5"    class="new_li">
<a href="http://www.fhjczf.com/product-detail/100917584167.html" data-num="9"  data-flag="0" target="_blank">
<table class="new_list">

<tr>
<td class="td_1"><div>品牌：</div></td>
<td class="td_2"><div>山推</div></td>
<td class="td_1"><div>型號：</div></td>
<td class="td_2"><div>160</div></td>


</tr>
<tr>
<td class="td_1"><div>底盤型式：</div></td>
<td class="td_2"><div>履帶式推土機</div></td>
<td class="td_1"><div>轉向方式：</div></td>
<td class="td_2"><div>履帶滑移轉向式</div></td>


</tr>
<tr>
<td class="td_1"><div>驅動方式：</div></td>
<td class="td_2"><div>全輪驅動式</div></td>
<td class="td_1"><div>司機位置：</div></td>
<td class="td_2"><div>司機座后置式</div></td>


</tr>

</table>
</a>
</li>
</ul>


<div   id="gn8cdul5"   class="s_product_contact plistk">
[山東濟南] <a  data-num="3"  data-flag="0" target="_blank">
安享恒瑞工程機械設備公司
</a>

<span id="gn8cdul5"    class="s_product_line">|</span>
<a  data-num="3"  data-flag="0" target="_blank">
瀝青混凝土攤鋪機,振動、振蕩壓路機,輪胎壓
</a>
<span id="gn8cdul5"    class="s_product_line">|</span>
<a   data-num="4" data-flag="0" rel="nofollow" data-pstate="0" data-conurl="http://lubanji.cn.makepolo.com/contact_us.html?proid=100917584167">
查看聯(lián)系方式
</a>
</div>
</div>
<ul class="s_product_param">

<li id="gn8cdul5"    class="plistk" id="">
報價:<strong>2.60萬</strong>元/件</li>
<li id="fenlei"><a onclick="stat2_rf('36be0e3f215b480d98f15fce82e68fd3','pc_search_xp_1_show')" href="http://www.fhjczf.com/product-detail/100917584167.html#inquiryPop" target="_blank" rel="nofollow">點此詢價</a></li>
</ul>
<div   id="gn8cdul5"   class="clear"></div>
<div   id="gn8cdul5"   class="value_add_service_con">
<ul>
</ul>
</div>
</div>
<div   id="gn8cdul5"   class="s_product_pic">
<div   id="gn8cdul5"   class="s_product_pic_box"><a href="http://www.fhjczf.com/product-detail/100917584167.html" target="_blank" data-num="7" data-flag="0" title="項城市租賃推土機  項城推土機出租"><img src="http://img11.makepolo.cn/images/formals/img/product/426/689/4_72f2f4e1de5f20c3ee542e685cf3ba85.jpg~tplv-fg0x5eo1ce-mp:280:210.image" onload="if(this.height>this.width*0.75){if(this.height>88){this.height=88;} }else{if(this.width>118){this.width=118;} }" alt="項城市租賃推土機  項城推土機出租"  onerror="javascript:this.src='http://jic.makepolo.cn/caigou/new/images/none.jpg'" /></a></div>
</div>
</div>

<div   id="gn8cdul5"   class="s_product_item">

<div   id="gn8cdul5"   class="s_product_content s_product_content_r">
<div   id="gn8cdul5"   class="s_product_title" score="5" pro_score="0">
<a target="_blank" class="plistk f14" data-num="1" data-flag="0" href="http://www.fhjczf.com/product-detail/100840788948.html">徐工180平地機型號,  山推PY220平地機 柳工平地機
</a>

</div>
<div   id="gn8cdul5"   class="s_product_info">


<ul class="s_product_parameter">
<li id="gn8cdul5"    class="new_li">
<a href="http://www.fhjczf.com/product-detail/100840788948.html" data-num="9"  data-flag="0" target="_blank">
<table class="new_list">

<tr>
<td class="td_1"><div>品牌：</div></td>
<td class="td_2"><div>徐工</div></td>
<td class="td_1"><div>型號：</div></td>
<td class="td_2"><div>徐工PY180平地機</div></td>


</tr>
<tr>
<td class="td_1"><div>底盤型式：</div></td>
<td class="td_2"><div>輪胎式推土機</div></td>
<td class="td_1"><div>轉向方式：</div></td>
<td class="td_2"><div>前輪轉向式</div></td>


</tr>
<tr>
<td class="td_1"><div>驅動方式：</div></td>
<td class="td_2"><div>后輪驅動式</div></td>
<td class="td_1"><div>司機位置：</div></td>
<td class="td_2"><div>司機座前置式</div></td>


</tr>

</table>
</a>
</li>
</ul>


<div   id="gn8cdul5"   class="s_product_contact plistk">
[上海] <a  data-num="3"  data-flag="0" target="_blank">
上海運胤工程機械有限公司
</a>

<span id="gn8cdul5"    class="s_product_line">|</span>
<a  data-num="3"  data-flag="0" target="_blank">
,挖掘機,靜作用壓路機,其他二手設備,輪胎壓
</a>
<span id="gn8cdul5"    class="s_product_line">|</span>
<a   data-num="4" data-flag="0" rel="nofollow" data-pstate="0" data-conurl="http://hufengjixiei.cn.makepolo.com/contact_us.html?proid=100840788948">
查看聯(lián)系方式
</a>
</div>
</div>
<ul class="s_product_param">

<li id="gn8cdul5"    class="plistk" id="">
報價:<strong>9.80萬</strong>元/臺</li>
<li id="fenlei"><a onclick="stat2_rf('36be0e3f215b480d98f15fce82e68fd3','pc_search_xp_1_show')" href="http://www.fhjczf.com/product-detail/100840788948.html#inquiryPop" target="_blank" rel="nofollow">點此詢價</a></li>
</ul>
<div   id="gn8cdul5"   class="clear"></div>
<div   id="gn8cdul5"   class="value_add_service_con">
<ul>
</ul>
</div>
</div>
<div   id="gn8cdul5"   class="s_product_pic">
<div   id="gn8cdul5"   class="s_product_pic_box"><a href="http://www.fhjczf.com/product-detail/100840788948.html" target="_blank" data-num="7" data-flag="0" title="徐工180平地機型號,  山推PY220平地機 柳工平地機"><img src="http://img12.makepolo.cn/images/formals/img/product/613/323/4_8735a93ba377e1bc5c77b3cb72106a24.jpg~tplv-fg0x5eo1ce-mp:280:210.image" onload="if(this.height>this.width*0.75){if(this.height>88){this.height=88;} }else{if(this.width>118){this.width=118;} }" alt="徐工180平地機型號,  山推PY220平地機 柳工平地機"  onerror="javascript:this.src='http://jic.makepolo.cn/caigou/new/images/none.jpg'" /></a></div>
</div>
</div>

<div   id="gn8cdul5"   class="s_product_item">

<div   id="gn8cdul5"   class="s_product_content s_product_content_r">
<div   id="gn8cdul5"   class="s_product_title" score="5" pro_score="0">
<a target="_blank" class="plistk f14" data-num="1" data-flag="0" href="http://www.fhjczf.com/product-detail/100296076001.html">山推 自行式 180平地機 刀板 平地機 刮平機刀板
</a>

</div>
<div   id="gn8cdul5"   class="s_product_info">


<ul class="s_product_parameter">
<li id="gn8cdul5"    class="new_li">
<a href="http://www.fhjczf.com/product-detail/100296076001.html" data-num="9"  data-flag="0" target="_blank">
<table class="new_list">

<tr>
<td class="td_1"><div>品牌/型號：</div></td>
<td class="td_2"><div>山推/180</div></td>
<td class="td_1"><div>型號：</div></td>
<td class="td_2"><div>180</div></td>


</tr>
<tr>
<td class="td_1"><div>發(fā)動機功率：</div></td>
<td class="td_2"><div>695（kw）kW</div></td>
<td class="td_1"><div>鏟刀寬度：</div></td>
<td class="td_2"><div>150（mm）</div></td>


</tr>
<tr>
<td class="td_1"><div>推裝斗容：</div></td>
<td class="td_2"><div>6（m3）</div></td>
<td class="td_1"><div>適用范圍：</div></td>
<td class="td_2"><div>濕地</div></td>


</tr>

</table>
</a>
</li>
</ul>


<div   id="gn8cdul5"   class="s_product_contact plistk">
<a  data-num="3"  data-flag="0" target="_blank">
馬鞍山信義工程機械配件科技有限公司
</a>

<span id="gn8cdul5"    class="s_product_line">|</span>
<a  data-num="3"  data-flag="0" target="_blank">
推土機,其他機床附件,礦山機械配件,其他粉碎
</a>
<span id="gn8cdul5"    class="s_product_line">|</span>
<a   data-num="4" data-flag="0" rel="nofollow" data-pstate="0" data-conurl="http://shop1372784375923.cn.makepolo.com/contact_us.html?proid=100296076001">
查看聯(lián)系方式
</a>
</div>
</div>
<ul class="s_product_param">

<li id="gn8cdul5"    class="plistk" id="">
報價:<strong>300.00</strong>元</li>
<li id="fenlei"><a onclick="stat2_rf('36be0e3f215b480d98f15fce82e68fd3','pc_search_xp_1_show')" href="http://www.fhjczf.com/product-detail/100296076001.html#inquiryPop" target="_blank" rel="nofollow">點此詢價</a></li>
</ul>
<div   id="gn8cdul5"   class="clear"></div>
<div   id="gn8cdul5"   class="value_add_service_con">
<ul>
</ul>
</div>
</div>
<div   id="gn8cdul5"   class="s_product_pic">
<div   id="gn8cdul5"   class="s_product_pic_box"><a href="http://www.fhjczf.com/product-detail/100296076001.html" target="_blank" data-num="7" data-flag="0" title="山推 自行式 180平地機 刀板 平地機 刮平機刀板"><img src="http://img2.makepolo.cn/images/formals/img/product/328/558/4b80199ea2990cf86d8f36e15e4d16e7.jpg~tplv-1fgsepqywg-mp:280:210.image" onload="if(this.height>this.width*0.75){if(this.height>88){this.height=88;} }else{if(this.width>118){this.width=118;} }" alt="山推 自行式 180平地機 刀板 平地機 刮平機刀板"  onerror="javascript:this.src='http://jic.makepolo.cn/caigou/new/images/none.jpg'" /></a></div>
</div>
</div>

產品推薦

彩票快三首页,彩票306官方版下载,德赢vwin入口,大发客户端在哪下载,真人投注下载,开心娱乐app官网入口,55彩票

推土機山推180參數(shù)