rod select relay 控制棒选择继电器
relay rod
继电器杆
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In the light of the problems with the inspection, such as bending the rod, scratching the shoulder of the rod and incorrect action of the pressure relay, measures for improvement are put forward.
针对调试过程中出现的顶弯抽油杆、划伤抽油杆挡肩与压力继电器误动作等问题，提出了改进方法。
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