母仪垂则辉彤管,婺宿沉芒寂夜台。
Mother meter vertical hui tong tube, wu lodge sink mans lonely night.
建立了铅垂油井杆管偏磨临界轴向压力的计算公式。
The calculating formula for critical axial load of worn rod string and tubing was set up.
建立了铅垂油井杆管偏磨临界轴向压力的计算公式。
The calculating formula for critical axial load of worn rod string and tubing was set up.
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