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welt seam是什么意思？

welt seam

相关单词 welt seam

例句

Factors affected coal seam permeability change and its law is analyzed. 分析了煤层透气性变化的影响因素及变化规律.
Coal Mine, its coal seam is easily spontaneous fire. 大雁二矿煤种为褐煤, 属易自燃发火煤层.
This seam of coal reposes on a layer of clay. 这个煤层处于一层黏土岩之上.
On a global scale, there are many coalfields suffered from spontaneous combustion of coal seam problems. 在全球范围内, 许多煤田都存在煤层自燃问题.
Seam Ripper : for ripping out unnecessary stitches and for opening machine - stitched buttonholes. 拆缝器: 用来拆除不需要的线迹或剪切纽洞.
Front width between armholes at sleeve seam place 17? 前袖孔之间的宽度在17套接缝的地方?
Wir sind das freundlichste Volk auf dieser Welt. 只要高兴,谁都可以来德国住住.
The authors used the Analytic Hierarchy Process ( AHP ) in the researches of coal seam floor water - irruption. 将系统工程中的层次分析法引入煤层底板突水的研究中.
Thirdly, the seam - tracking harmonically controlling algorithm of robot is designed. 第三, 设计了机器人焊缝跟踪协调控制算法.
The method of gas drainagecoal seam gas drainage , near coal gas drainage , and goaf gas drainage. 瓦斯抽放的方法有本煤层抽放、邻近层抽放和采空区抽放.

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