... 双孔透镜 double aperture lens 双筒泵 double barrel pump 双梁天平 double beam balance ...
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double barrel midship pump 双筒船中部抽水泵
double barrel midshellop pump 双筒船中部缩抽水机
double-pump barrel assembly 双泵筒总成
double e barrel midship pump 双筒船中部抽水泵
double-case barrel type pump 双壳桶形泵
a pump double barrel 一泵双管
·2,447,543篇论文数据，部分数据来源于NoteExpress
In accordance with this problem, a new pump of small diameter with double barrel has been developed. Experimental study of the deep pumping process has been conducted and attained a success.
针对这一问题，研究设计新型双筒式小直径抽油泵，进行了深抽采油工艺技术的试验研究，获得了成功，取得了良好的经济及社会效益。
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