用钻 、 挖或掘的方式打通 ( 如, 隧道 )To form ( a tunnel, for example ) by drilling, digging, or burrowing.用钻铤连接探深板.Connect the feeling plate to the drill collars.介绍一种钻床用钻轴均布可调多轴头.Multiple spindles heads for drilling machine whose dril...