Founded in June 2005 in Chongqing, China, YAMAMOTO Chongqing Rock Drilling Machine Co. Ltd. has introduced advanced drilling machine technologies from Japan and smelting technologies and machining processes for its key components. It covers an area of more than 22,000m2, with a construction area of over 14,000m2. The Company mainly engages in research, development, production, and sales of mining machine and components. Its annual yield of air-leg rock drilling machines reaches over 50,000 sets....
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