单项选择题
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
The common method of applying oil to the cylinder walls...
单项选择题The common method of applying oil to the cylinder walls is by means of small pump assembled in units, known as （）.
A.mechanical lubricator B.lubrication function C.forced feed system D.bearing lubrication
