题目内容
Mooring winch should be equipped with mechanical brakes which are capable of holding ______.
查看答案
搜索结果不匹配？点我反馈
更多问题
A centrifugal pump may fail to deliver water when first started if the ______.
The major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by ______.
Cooling of engines is achieved by circulating a cooling liquid around internal ______within the engine.
In a diesel engine, when refitting piston rings you should______. I. check the ring gap at
微信支付 
支付宝支付