Welding Machine,Tig Welding Machine,Pulse Welding Machine Prosper Industry And Trade Co., Ltd. , http://www.pxweldingmachine.com
Recently, China's self-developed 200,000-ton polypropylene twin-screw extrusion granulation unit successfully drove in Beijing Yanshan Petrochemical once, filling the domestic gap. It is reported that China's annual ethylene production is about 14 million tons, ranking the third in the world, but the large twin-screw extrusion granulation unit is mainly dependent on imports. Prior to this, only three companies in Germany and Japan had the design and manufacturing capabilities of the equipment.