常见例句雙語例句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.汽車發動機上的活塞環通常是有接口的。但在一些重型發動機上,活塞環的接口可以是斜角接口,搭接式或密封式的。 返回 lapped butt