The projecting beam angle can be manually adjusted using a screwdriver, and the adjustable power setting reduces hot spots and washouts. 投影光束角度可使用螺丝刀手动调节,可调节电压的设置能降低热点和冲刷的伤害。
The Analysis and Remedy Measures on Drill Pipe Washouts of Well Fuyang 1 富阳一井钻杆刺漏分析及预防措施