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DHD (Down-Hole Dynamic) DTH (Down-The-Hole) bits are drilling bits used for drilling through rock. DTH bits are used in conjunction with DTH hammers, which are hydraulic percussion hammers that drive the DTH bit into the rock. DTH bits come in a variety of sizes and styles, depending on the type of rock being drilled and the drilling application. Some common types of DTH bits include conical bits, button bits, and cross bits. DTH bits are commonly used in the oil and gas industry, as well as in construction and mining.

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