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This article studies the auto_position system of rock drilling arm.
就凿岩钻臂的自动定位系统进行了研究。
youdao
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The sand control of oil well pump is very important for drilling-production system.
抽油泵防砂是钻采系统防砂的一个重要环节。
youdao
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The sand control of oil well pump is very important for drilling-production system.
抽油泵防砂是钻采系统防砂的一个重要环节。
youdao