roller bit造句
造句與例句
手機(jī)版
- In 1939, after working as a Sales Engineer with Reed Roller Bit Company in fracturing and cementing.
- It is unlikely that he actually invented the two-cone roller bit, but his legal experience helped him in understanding that its patents were important for capitalizing on the invention.
- In the 1970s, outside of the oil and gas industry, roller bits using mud circulation were replaced by the first pneumatic reciprocating piston Reverse Circulation ( RC ) drills, and became essentially obsolete for most shallow drilling, and are now only used in certain situations where rocks preclude other methods.
- It's difficult to see roller bit in a sentence. 用roller bit造句挺難的
如何用roller bit造句，用roller bit造句，roller bit in a sentence, 用roller bit造句和roller bit的例句由查查漢語詞典提供，版權(quán)所有違者必究。