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Drilling
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平 角
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平均井斜角
average angle
平均角法
average angle method
平面直角坐标
plane rectangular coordinate
平面直角坐标
grid coordinate
水平转角
feather angle
牙轮轴线与钻头底平面的夹角
pin angle
角-平均法
用于定向井计算
angle-averaging
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