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Drill steel & rock bits drill steel, paired with a rock bit, is often used to drill holes larger than 1-1/2" and is available in lengths up to 120". champion chisel offers h-thread, 11 degree taper, rope & d-thread steel & bits. drill steel is produced using a hollow steel to allow either water or air to be pumped through to keep the drill hole ...

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Dth drill hammer, dth hammer, dth drilling tools manufacturer / supplier in china, offering super quality 6 inch dth hammer for rock drilling, xrvs1050 / xrhs1150 portable mobile air compressor, xats1050 portable diesel air compressor for construction work and so on.

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