Before shutting off the fuel supply to stop a medium or high–speed diesel engine, why is it necessary to allow the engine to idle for a few minutes?() To prevent internal damage form local overheating。 To ensure the fuel nozzles are flushed clean。 To clear the smoke stack。 To let the waste heat boiler reduce its rate of steam generatio。
因为家里距离单位远,需要转乘车辆的员工最不喜爱的排班方式是()。 早班。 晚班。 连班。 跳班。
分解槽结疤是怎么形成的?
风管堵塞的原因是什么,如何处理?
救火应变中,全体船员要在思想上做好可能紧急救生或弃船的准备。
The period of a lighted aid to navigation refers to the().