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Qingyuan Hongyuan Machinery Manufacturing Co., Ltd.
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Hongyuan Series Impact Drilling Rig Introduction
Hongyuan series impact drilling rig is a new type of impact drilling rig improved on the basis of the original CZ-22-30 steel rope impact drilling rig. It is mainly used for drilling foundation piles for water conservancy projects, construction proje
Created on 10.14
Our company specializes in the production of “Hongyuan” brand truck-mounted positive and negative circulation drilling rigs.
Qingyuan Hongyuan Machinery Manufacturing Co., Ltd. specializes in the production of “Hongyuan” brand truck-mounted positive and negative circulation drilling rigs, the products sell well all over the country, and are widely used in high-speed railro
Created on 10.14
Research on domestic ultra-high voltage transmission technology
Starting from 1986, China has successively included the research on UHV transmission technology in the national “7th Five-Year Plan”, “8th Five-Year Plan” and “10th Five-Year Plan” for scientific and technological research. In the past two decades,
Created on 10.14
Research on Relay Protection and Monitoring Technology of Extra High Voltage Transmission
The research and development of relay protection and monitoring technology for 1,000 kV ultra-high voltage transmission in foreign countries is introduced, and the relevant technical problems that need to be studied in this area in China are put f
Created on 10.14
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