sucker rod substitute是什么意思 sucker rod substitute怎么读
sucker rod substitute的相关资料
sucker rod substitute的用法和样例
- The new assembly can make the joint of the polished rod pass through, therefore can meet the need of new oil production technology.
这种密封盒可以使比光杆杆体直径大得多的光杆接头通过，能满足新的采油工艺需要。
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