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circulating sub
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循环阀
在测试结束后,可为环空和管柱之间建立循环通道,用于替出管柱中的地层流体和循环压井作业的阀门。
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gravity retaining structure
gravity retaining wall
gravity satellite
gravity satellite program
gravity separation of wastewater
gravity separator
gravity settling
Gravity settling equipment
Gravity's Rainbow
gravity survey
gravity thickening of mineral processing products
gravity tide correction
gravity wave
gravity waves
gravothermal catastrophe
gravure cylinder
gravure plate making
Gravure Printing Press
gravure trolley
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gray analysis
grayanotoxin
gray black coating
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