Practice proves the testing accuracy of the displacement and motion Pattem of the drill pump valve me...

实践表明，泵阀位移及运动规律的测试精度能满足理论分析的要求。

youdao

Practice proves the testing accuracy of the displacement and motion Pattem of the drill pump valve me...

实践表明，泵阀位移及运动规律的测试精度能满足理论分析的要求。

youdao