单项选择题
A.stop valves B.interlocks C.non-return valves D.air vents
The starting air system usually has （） to prevent start...
单项选择题The starting air system usually has （） to prevent starting if anything is not in order.
A.drain cocks B.vent valves C.counteracts D.interlocks
The space between cylinder liner and jacket is called （...
单项选择题The space between cylinder liner and jacket is called （）.
A.the cooling water B.the circulating water C.the cooler D.the cooling water space
A.the circulating tank B.the scavenge box C.the cooling water space D.the cooler
