Frequent leakage of mechanical seal of quenching oil circulating pump was a hard problem in ethylene production.

急冷油循环泵的机械密封频繁泄漏是困扰乙烯生产的老难题。

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The case of recoiler is used as an oil tank, on which the lubrication oil pump is mounted for circulating lubrication.

技术改造的关键是手油泵、油泵及传动箱总成的设计。

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