计算结果表明，质量合格的石油钻机传动滚子链能胜任链条抽油机的传动。
The result of calculation shows that qualified roller chains for drilling rigs are competent for the job on chain-drive pumping units.
计算结果表明，质量合格的石油钻机传动滚子链能胜任链条抽油机的传动。
The result of calculation shows that qualified roller chains for drilling rigs are competent for the job on chain-drive pumping units.
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