单项选择题
A.the type of coolant B.the design of the engine C.the type of fuel to be burned D.B and C
The sealing rings are in four parts and pressed togethe...
单项选择题The sealing rings are in four parts and pressed together around the piston rods by means of （）.
A.nuts B.bolts C.coil springs D.stuffing boxes
The scavenging box is built of a number of sections pro...
单项选择题The scavenging box is built of a number of sections provided with vertical flanges enabling them （） together to form two blocks.
A.being bolted B.bolted C.bolting D.to be bolted
The scavenging air ports are located at （） that they ar...
单项选择题The scavenging air ports are located at （） that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.
A.so a height B.such a height C.so high D.such high
