The ground lifting machine for coal seam gas coring drill is required to be speedy and powerful.

对与煤层气井用绳索取心钻具配套使用的地面升降装置要求提升能力足、提升速度快。

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The ground lifting machine for coal seam gas coring drill is required to be speedy and powerful.

对与煤层气井用绳索取心钻具配套使用的地面升降装置要求提升能力足、提升速度快。

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