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DEVICE FOR CONTROLLING PRESSURE IN DRILLING RIG HYDRAULIC SYSTEM
DEVICE FOR CONTROLLING PRESSURE IN DRILLING RIG HYDRAULIC SYSTEM
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机译:钻机液压系统压力控制装置
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摘要
the invention относитс to the mining industry. the purpose of изобретени - improved accuracy потребл емой управлени and reducing power.the device contains a valve 1, состо щий of heads 2 управлени
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