免费亚洲黄色_掀开奶罩边躁狠狠躁软学生动漫_欧美日本中文在线观看_91久久精品亚洲_男人香蕉好大好爽视频_日韩不卡中文字幕av_一区二区三区蜜桃视频sm_国产人体视频_中文字幕无码乱码人妻_国产综合精品蜜芽

The drilling machine adopts mechanical transmission, simple structure, convenient for maintenance and operation. The drilling rig is equipped with water brake device

The rig is compact and simple in structure. Each part of the rig, including the drill pipe, can be transported by a 5-ton truck. In areas where transportation is not convenient

Hydraulic oil pump: double type, large displacement pump provides power for the power head, small displacement pump provides power for four outrigger cylinder, mast cylinder

When the power supply of the main motor heater of the top drive device is normal and the main motor is not running, the heater can be started and stopped by the "motor heating" switch on the door of the PLC/MCC cabinet