单项选择题
A.pressed；to B.pressurized；with C.pushed；in D.compressed；to
A cast steel strong back is fitted in way of the combus...
单项选择题A cast steel strong back is fitted in way of the combustion space to help absorb （）.
A.flame temperature B.fuel oil C.air movement D.gas forces
（） clearances in the main or crank pin bearings will so...
单项选择题（） clearances in the main or crank pin bearings will sometimes be indicated by loss of pressure in the lubricating system before any bearing knock is heard.
A.Too larger B.Too smaller C.Excess D.Excessive
（） supplies pilot air to control the cylinder air start...
单项选择题（） supplies pilot air to control the cylinder air start valves.
A.An air compressor B.An indicator cock C.An air distributor D.A safety valve
