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ZhouShan WeiDa Machinery Co., Ltd. was established in the year of 2000.We are a specialized engaged in designing, developing and producting screws and barrels manufacturer .The products which are main parts of conical twin screw extruder, parallel twin screw extruder, single screw extruder, injection molding machine, rubber machine, chemical fibre machine, foaming extruder. The material is 38CrMoALA alloy steel which have the advantage of long lasting life, high wearability and good anti-corrosion through thermal refining, qualitative analyzing, nitriding, polishing and other processes. So our parts can absolutely used for advanced machines domestic and overseas.After more than ten years of constantly pioneering efforts, we have enlarged our production scale . In addition, we are managed strictly under ISO9001-2000 Quality Certification System. Now we have already had a series of perfect quality guarantee and after-sale service system. Meanwhile, we have won good reputation in quality and credit through high precision machines, advanced technology, integrative work flow .We will always obey the principle of keeping the contract and promise, surviving on quality, developing on honesty and credit to serve all customers.