A.磁性補(bǔ)償值 B.工具面補(bǔ)償值 C.收斂角補(bǔ)償值 D.磁偏角補(bǔ)償值
A、contact the pipe B、contact the single C、make up the joint D、contact the single pipe
A、down the trip B、down the pipe C、down the hole D、run the pipe back