“pump rod”可以造什么句，pump rod造句
来源：语文精选馆 1.58W
Due to the special structure of controlled direction well, it can lead to severe abrasion even jamming if not adopting any measure when using progressing cavity pump rod to pump oil.
It can be used in antomatic eddy testing of the tubings with joints, and also in the automatic testing of pump rod.
