国产成人a一片免费看,精品久久成人区二区,欧美中文字幕一区二区三区老色批,成年免费大片黄在看,亚洲无码在线播放

kerry brand KT20 open-air DTH drilling rig is kerry Group after years of development and production on the basis of DTH drill rig,according to the need of large open-pit mine,elaborate design new drilling equipment.The drill rig walking, propulsion, rotate and angle adjustment adopts hydraulic drive,Power Flow Strong;With high wind pressure screw head and high wind pressure pneumatic impactor,High drilling efficiency;Equipped with hydraulic dry dust collector to collect dust,reduce environmental pollution ;And is equipped with hydraulic manipulator library handling down the drill pipe and drill pipe,Floating joint protection drill pipe thread,A person can be handling down the drill pipe;Air conditioning cab provide comfortable working environment and automatic control card valve to reduce the rate of drill.This drilling righas good integrity, high degree of automation, good effect of drilling, environmental protection and energy saving, convenient operation, flexible, road safety, etc.