常见例句双语例句Rings for automotive engine usually have butt joints, but in some heavy-duty engines, the joints may be angled, lapped, or of the sealed type.汽车发动机上的活塞环通常是有接口的。但在一些重型发动机上,活塞环的接口可以是斜角接口,搭接式或密封式的。 返回 lapped butt