Liaocheng Ruizuan Construction Cutter Co.,Ltd is a professional manufacturer of rotary bits,coal mining bits,flat bits and shield driving cutters."Ruizuan"products are widely used in coal mine, underground mine, tunnel, subway, metallurgy, water conservancy project, highway projects and other projects."Ruizuan"products are well accepted by customers in more than 20 provinces,municipalities,autonomous regions and Japan, America, the United Arab Emirates, Brazil, Australia and other abroad...
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