单项选择题
The bed-plate is secured in the longitudinal direction by means of bolts known as （）.
A.end-chock bolts B.side-chock bolts C.through bolts D.tie rods
单项选择题 The bearing shells depend on the accuracy of （） to held them in a truly circular shape.
单项选择题 The bearing shell generally has （） for location and oil grooves round the center of its axial length.
单项选择题 The auxiliary engine and a cgenerator can be connected with （）.
