单项选择题
A.once every crankshaft revolution B.once every two crankshaft revolutions C.once every piston stroke D.twice every piston stroke
When a ship is involved in an oil pollution incident in...
单项选择题When a ship is involved in an oil pollution incident in China, the ship must report without delay to（）
A.China Maritime Administration B.the company C.the cargo owner D.ship owner
Faulty operation of diesel engine fuel injection nozzle...
单项选择题Faulty operation of diesel engine fuel injection nozzles can be directly caused by （）.
A.water in the fuel oil supply B.excessive fuel nozzle holder cooling C.a distorted fuel spray pattern D.leakage past the plunger into the oil drain
