ring-stiffened concave cone-toroid-cylindercombined shell是什么意思 ring-stiffened concave cone-toroid-cylindercombined shell怎么读
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ringn.戒指；环；圈；拳击场；马戏场；帮派n.铃声；钟声；电话；口气v.包围；环绕；形成圈v.打电话；回响；鸣响；按铃；听上去
ring wear活塞环磨损
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