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用天井钻井机钻进的天井额定直径为1.6米,高度为100米以内,超前孔直径为270毫米,倾角60°~90°。 2KB型天井钻井机技术特性
Patio drilling machine with a patio diameter of 1.6 meters, a height of 100 meters less than advance hole diameter of 270 mm, angle of 60 ° to 90 °. 2KB type well drilling machine technical characteristics