split piston skirt 沟槽活塞裙
split piston ring 拼合活塞涨圈
split-ring piston packing [机] 开环式活塞胀圈
split skirt piston 开口裙活塞
split-skirt piston 导缘开缝活塞
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The rings have joints (they are split) so that they can be expanded and slipped over the piston head and into the recessed grooves cut in the piston.
活塞环有接口(也就是有一缝隙),这样可以使端部扩张并滑入活塞上的凹槽中。
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