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Tianjin HENGRUI Plastic Machinery Co. Ltd (hereinafter to be referred as Tianjin HENGRUI Company) is a private stock company, which locates in Beichen Hi-Tech Industrial Park, Tianjin city. The HENGRUI Company was founded in 1994 and covers an area of 1.76 hm2. There are about 100 staffs in the company. Twenty of them are engineers and 50 per cent of them have been engaging in plastic manufacture for 15~30 years.