单项选择题
A.the cylinder weight B.the cylinder bore C.the cylinder length D.the cylinder cover
The main factor determining the output of each cylinder...
单项选择题The main factor determining the output of each cylinder is the cylinder （）.
A.density B.bore C.weight D.material
The main bearings are provided with thin-walled （）, lin...
单项选择题The main bearings are provided with thin-walled （）, lined with a copper-lead alloy.
A.steel guides B.steel shells C.steel bearing caps D.pig iron
The main bearing shells often have a thin （） of lead or...
单项选择题The main bearing shells often have a thin （） of lead or indium to provide a layer giving protection against corrosion.
A.flange B.flash C.plate D.sheet
