单项选择题
A.small than B.more than C.little than D.less than
The compressed air is supplied by （） to the air reservo...
单项选择题The compressed air is supplied by （） to the air reservoirs.
A.compressors B.forced fans C.ventilators D.generators
The compressed air is admitted to each cylinder through...
单项选择题The compressed air is admitted to each cylinder through a cam operated by starting air valve when the piston has just passed its （）.
A.BDC B.TDC C.BBDC D.ATDC
The complete assembly of bedplate, A-frames and cylinde...
单项选择题The complete assembly of bedplate, A-frames and cylinder block is held together by （） to form a rigid structure.
A.tap-bolts B.jack-bolts C.tie rods D.fitted rods
