Zhangqiu Gaoruida Pump Industry Co., Ltd. is a professional manufacturer of Roots blowers with fifteen years of manufacturing experience. It produces three-leaf Roots blowers and water ring vacuum pumps. It has independently developed a new type of high-efficiency Roots blower and obtained two patents, which have achieved significant results in noise reduction and energy saving.

Zhengzhou Great Wall Science & Technology Co., Ltd. has been focusing on the production of laboratory scientific research instruments and equipment for 36 years, creating high-quality domestic instruments, providing laboratory scientific research units with one-stop scientific instruments, experimental equipment, and technical solutions such as rotary evaporators, glass reactors, diaphragm vacuum pumps, constant temperature circulators, and agitators, to help the development of China's scientific research.