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This product by the national Changsha mine production safety inspection of mechanical and electrical products testing center, has obtained the national mine product safety mark certificates issued by the Office of the mine's safety signs.

This product produces the Changsha mine mechanical and electrical products examination test center examination after the national security to be qualified, has obtained National Mineral product Product Safety mark Office to issue "Mineral product Product Safety mark Certificate".

This product has passed the national industrial safety and mechanical and electrical products Taiyuan test, inspection and testing center has achieved national coal mine safety mark products issued by the Office products used by the mine safety certificate.

This product by the national Changsha mine production safety inspection of mechanical and electrical products testing center, has obtained the national mine product safety mark certificates issued by the Office of the mine's safety signs.