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、主机质量 120㎏ 一、特点: yd—22ⅱ型液压捣固机 yd—22ⅱ型液压捣固机双导柱框架结构，双缸升降方式。由汽油机驱动；有齿轮泵、手动泵、换向阀、震动盘、捣镐、升降
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、采空区、进风回风区快速放顶问题。20t/30t锚索退锚机是煤矿井下锚索退锚的一种专用涨拉机具,主要用于煤矿巷道顶板应力释放和回收索具。20t/30t锚索退锚机特点： 锚索退锚机由双
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