Yantai Keda Controlled Atmosphere Equipment Co., Ltd. is a professional manufacturer of Keda gas controlling equipment with production and research engineering team on gas controlling equipment and fresh-keeping technology field for over 20 years. Our company has built a scientific cooperation with universities and research institutions and formed the mode of university and enterprise production and research developing mode.

The Sany Group was founded in 1989 as a small welding materials factory. Today, it is the largest construction machinery corporation in China and the fifth largest globally. Two of its member companies are listed on separate stock exchanges; Sany Heavy Industry Co., Ltd. On the Shanghai Stock Exchange and SANYHE International Holdings Co., Ltd. On the Hong Kong Exchange. And Sany Heavy Industry Co., Ltd. Was the first-ever Chinese business to successfully achieve the government-owned enterprise transfer to the private sector under the non-tradable stock reform program. It is also listed among the world's top 500 companies in the construction machinery industry.

Henan Yugong Machinery Co., Ltd, located in Zhengzhou, Henan province, China, which is a large engineering machinery manufacturing enterprise focusing on the research and development, production and sale of varied kinds of drilling rigs. Our drilling rigs are widely applied for water well drilling, farm irrigation, geological prospecting, small pile foundation, geothermal air-conditioner and so on. We insist on the strategy of technology research and development. Technical design, material purchasing, precised manufacturing and strict quality inspection are all processed according to the ISO9001 standard.