eccentric wear of plunger
eccentric wear of plunger
柱塞偏心磨损
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The utility model can efficiently prevent air locking phenomena and the eccentric wear of the plunger, increase the production quantity of raw oil and extend the service life of the oil well pump.
本实用新型可有效地防止“气锁”和 柱塞偏磨，提高原油产量和抽油泵的使用寿命。
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