The registration address of shandong sentinel security equipment ltd. Is located on the fourth floor of the building no. 1 of the 9th-party innovation valley accelerator of qingyun lake street, located in chinan district, shandong province. The registration authority is the qiandong district market supervision authority, which is represented by legal persons. It covers public safety equipment, instrument instruments, alarms, daily miscellaneous items, fire protection equipment, gas-fired equipment, valves, mechanical and electrical equipment, mine machinery, environmental protection equipment, hardware and equipment, gold products, mechanical and electrical equipment, plastics, compressors, electronics, computer hardware and hardware development, sale and maintenance; the processing, production and sale of labour protection items, clothing caps, needle textiles, security equipment; the professional contracting of water protection against corruption and temperature engineering; the c...