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Terms for subject Oil / petroleum containing 上 塞 | all forms | in specified order only
ChineseEnglish
上刮胶塞top wiper plug
上塞wiper plug
上塞upper plug
上塞注水泥法top-packer method
上胶塞top cementing plug
方钻杆上旋塞upper kelly cock
注水泥上塞follower plug
活塞上行piston stroking upward

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