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Dth drilling – efficiency and flexibility. when you need to drill high quality holes with diameters between 100-254 mm, dth (down the hole) drilling is by far the best and most effective method. dth drilling can be performed in most types of rock, hard or soft. it's a commonly used method in the mining industry (blast hole drilling), waterwell drilling, construction, and in the oil and gas …

Rc hammers the missile reverse circulation line of hammers are used in a wide range of drilling rigs in various geological formations. they are preferred by on-site geologists for their high percentage of uncontaminated sampling; their fast penetration rates; and their trouble-free, low-cost, and long life performance.

Sinorock® divides our self drilling anchor system into r thread self drilling anchor bolt and t thread self drilling anchor bolt. the sizes of our self drilling anchor bolt include r25, r32, r38, r51, t30, t40, t52, t73, t76, t103, t111, t127, t130, t150 and t200.

Sep 12, 2019 · the craftsman cobalt drill bit set is an indexed drill bit set made from a combination of solid cobalt and steel. the bits have a durable structure that’s suitable for heavy-duty use and drilling...

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