离岸价格
获取最新报价500 ~ 5000 / Piece ( Negotiable )
|Minimum Order
位置:
Changsha,Hunan,China
最小订单价格:
最小订单:
1 Piece
包装细节:
woodcase, carton
交货时间:
25day
供应能力:
10000 Piece per Week
付款方式:
L/C, T/T
联系人 Mr. James
Taohua village, Hanpu town,Yuelu district, Changsha, Hunan
in the hole range *****4 mm (3"**0"), DTH
drilling is the dominant drilling method today
(especially when the hole depth is greater than *0 meters). The
main features of DTH drilling in this hole range are:
• Excellent hole straightness within 1.5% deviation without guiding
equipment.
• Good hole cleaning with plenty of air for the hole cleaning from
the hammer.
• Good hole quality with smooth and even hole walls for easy
charging of explosives.
• Deep hole drilling capacity with constant penetration and no
energy losses in joints.
• Efficient energy transmission.
• The disturbance to the ground is kept minimum, and for drilling
rock, the penetration rate is outstandingly high.
• More cost-effective than the conventional rotary drilling.
