Zhejiang Shangyu Oil Seal Co., Ltd. was founded in 1969 and is located in ZHEJIANG . PQK mainly produces oil seals ,O-rings ,Adhesive bonded seals,rubber products for the domestic and foreign automotive industry, household appliances, industrial machinery, etc. It is a member of the Sub-Technical Committee of Standard Rubber Sealing Products of the National Rubber Standardization Technical Committee and a member of the Sub-Technical Committee of Sealing Devices of the National Hydraulic and Pneumatic Standardization Technical Committee. It is a national standard-setting unit and has obtained more than 40 national invention and utility model patents.

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