无码a级毛片免费视频内谢-高清freexxxx性国产-无码熟妇人妻av在线电影-美女内射毛片在线看免费人动物

The National Glass Quality Supervision & Inspection Center was established in 1985, and located in Qinhuangdao, Hebei Province. It is the first “three-in-one” inspection and detection institution certified by China Metrology Accreditation (CMA), authorized by China Accredited Laboratory (CAL) and approved by China National Accreditation Service for Conformity Assessment (CNAS). It is also the first national center of glass industry in China. The Center focuses on research of detection technology, product quality detection, standard setting and revising, as well as development of instruments and equipments. It has the highest level in the aspect of glass product quality inspection in China.