体管门
Body tube door
以上为机器翻译结果，长、整句建议使用 人工翻译 。
目前的井眼轨迹方位角测量技术主要靠磁通门传感器，这种技术受地磁场及测量体周围金属管体的制约。
At present, hole trajectory azimuth Angle is measured mainly with magnetism sensor, but which is restricted by magnetic field and the metal tube around the surveying equipment.
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