The cylinder covers are secured by eig

1、The shells are secured by means of bea

The shells are secured by means of bearing caps and studs, the necessary clearance being provided by means of （） of different thickness.AshimsBpackingCglandsDwasher

2、Each cylinder is closed at the top by

Each cylinder is closed at the top by a _____, made of a special heat-resistant steel.Acylinder linerBcoupling flangeCcylinder coverDpiston crown

3、The cylinder cover is not provided wit

The cylinder cover is not provided with ( )Afuel valveBthe starting valveClubricator

4、The guide shoes are secured to the cro

The guide shoes are secured to the crosshead by means of（）Athrough boltsBend chock boltsCside chock boltsDtap-bolt

5、Each cylinder is closed at the top by

Each cylinder is closed at the top by a （）, made of a special heat-resistant steel.Acylinder linerBcoupling flangeCcylinder coverDpiston crow

6、The cylinder cover is not provided wit

The cylinder cover is not provided with （）.Afuel valveBlubricatorCindicator valveDthe starting valve