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Square drill rod
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The drill rod diameter of the drill jumbo is mostly 19-28mm, with a length of 0.5-3m. It is made of high-strength alloy steel, and is quenched and tempered to enhance toughness and wear resistance. The torsional strength of the joint exceeds 8000N·m. It is mainly used for excavation support in coal mine roadways, and is used with the drill jumbo to simultaneously complete rock breaking, drilling of anchor rods, and support operations, improving the efficiency and safety of roadway construction.
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