英语词典
Analysis on φ 88.9mm square Kelly break in well WS1
WS1井φ88.9mm四方钻杆断裂原因分析
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the kelly bushing (kb) has an inside diameter profile that matches that of the kelly, usually square or hexagonal.
方钻杆补心的内径通常与方钻杆的外径(通常是四方钻杆或六方钻杆)相匹配。
Kelly: The dragon dance in the town square was really spectacular.
凯利: 城市广场上的舞龙,真是令人叹为观止.
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