压缩机调速器调整
compressor governor adjustment
不正确的调速器组装
improper governor assembly
紧急试验器调速器校准装置
pop tester governor calibration bench
井筒中的机械装置
wellbore mechanical layout
控制面板装用的调速器选购件
control panel mounted governor option
随时可用机器的装载
ready-to-work machine weight