预润滑压力开关继电器
prelube pressure switch relay
plpsr
进气预润滑泵润滑器
air prelube pump lubricator
进气预润滑泵润滑器机油
air prelube pump lubricator oil
润滑压力开关塞子
lubrication pressure tap plug
电动预润滑泵马达起动器
electric prelube pump motor starter
预润滑泵磁力开关
prelube pump magnetic switch