COMPANY PROFILE：Tianjin Haorui Technology Co., Ltd. is specializing in designing and manufacturing vacuum system and parts for many years. Our products are widely used in electronics, photovoltaics, vacuum coating, semiconductor, vacuum heat treatment furnace, pharmaceutical, etc. After years of professional technology and experience accumulation, our high quality, high precision and reliability are well received by the industry. Haorui products include vacuum pumps, vacuum valves, connectors, vacuum instruments ,etc. It is manufactured with high quality materials and advanced technology to ensure excellent pressure resistance and sealing performance....