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continuous circulation valve—CCV
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continuous circulation valve—CCV
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控压钻井
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continuous circulation valve—CCV
阀式连续循环钻井系统
地面控制系统与接在钻杆上的连续循环阀联合作用,实现在接单根期间钻井液循环通道的切换,进而保持井下钻井液连续循环的特殊钻井作业设备组合。
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Yu Dong
Yudong Zhen
Yu-drum
Yudujun Shan
Yudu Xian
Yudzhen Zhou
Yue Ban
Yue Bochuan
Yuecheng Ling
Yuecheng Longmu Zu Miao Temple
Yuecheng Reservoir
Yuechi Xian
Yue Chu
Yue Dao
Yue dialects
Yuediao opera
Yuediao Opera Conservation and Inheritance Center of Henan Province
Yuedong black pig
Yue Dong Xiao Shuo Lin
Yue Fei
Yuefei Temple in Tangyin
Yuefuchuansheng(a book on the singing techniques of Chinese drama)
yuefu poetry of Northern Dynasties
yuefu poetry of Southern Dynasties
yuefu poetry style
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