This modification in the XY-44 Mine drilling rig based on the addition of automatic revolving tower of the drilling rig so that the function will be more perfected.
改装是在XY - 44型矿用钻机基础上，增设了自动回转塔架部分，从而使钻机功能更加完善。
This modification in the XY-44 Mine drilling rig based on the addition of automatic revolving tower of the drilling rig so that the function will be more perfected.
改装是在XY - 44型矿用钻机基础上，增设了自动回转塔架部分，从而使钻机功能更加完善。
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