2QSAAA
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QSAAA
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At present, hollow steel is made of large-section rolling square billet and 150X150 continuous casting billet by using the process of boring + rolling with core. The production process is controlled, and the product quality is steady.
The Company produces 20,000-30,000 tons of hollow steel every year. It mainly produces GTⅢ and G30 rock drill rods that are applied to mining, tunnel engineering construction of expressways and railways, engineering construction of large hydropower stations and nuclear power stations, etc.
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