8-1/2”钻头与6-1/2”钻铤之间的变换接头是:()

A.4-1/2”IFBOX*4-1/2”IFBOX B.4-1/2”REGBOX*4-1/2”IFBOX C.6-5/8”IFBOX*4-1/2”IFBOX D.4-1/2”REGBOX*6-5/8”IFBOX

时间:2023-02-16 12:37:02

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