你可能感興趣的試題

單項選擇題

Each journal and pin should be examined for （） and grooving.

A.bridges
B.recesses
C.rears
D.ridging

單項選擇題

Each cylinder liner on the marine medium speed engines （）.

A.is usually cooled by sea water
B.can be replaced when worn out
C.is in direct contact with the water in the bore of the cylinder
D.can t expand when heated

无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

Each piston stuffing box is provided with two sealing rings and three（）

你可能感興趣的試題

Each journal and pin should be examined for （） and grooving.

Each cylinder liner on the marine medium speed engines （）.