矿用坑道钻探钻杆 扭矩试验方法
Standard drill rod for drilling in mine tunnel-Torque test methods

2019-05-02

煤矿坑道钻探用常规钻杆
Standard drill rod for drilling in coal mine gallery

2006-08-19

煤矿坑道钻探用往复式泥浆泵
To-and-fro mud pump used in coal mine tunnel drilling

2011-04-12

煤矿用反井钻机钻杆
Drill rod of raise boring machine for coal mine

1997-11-10

煤矿锚杆钻机用回转钻杆
Rotary drill rod used for coal mining roofbolter

2002-04-08

矿用反井钻机钻杆失效技术条件
Failure technical conditions of drilling rod for mine raise boring machine

2008-11-19

煤矿用钻杆圆锥螺纹体型式和基本尺寸
The style and basic size of taper screw-thread body of drill rod for coal mine

2011-04-12