单项选择题
A.distribution boards B.section boards C.emergency switch boards D.main switch boards
The main generators are connected to（）.A.distribution b...
单项选择题The main generators are connected to（）.
UMS stands for（）.A.ultra much spaceB.universal medium s...
单项选择题UMS stands for（）.
A.ultra much space B.universal medium system C.unit machined space D.unattended machinery space
Oil mist detectors are usually used on board to detect ...
单项选择题Oil mist detectors are usually used on board to detect oil mist density within （）.
A.the engine crankcase B.the engine scavenge boxes C.drain tanks D.fuel tanks
