威尼斯人注册送56元

LOCATION:HOME > ENGINEERING > PATENT TECHNOLOGY

PATENT TECHNOLOGY

The company has 131 valid patents, including 23 invention patents and 108 utility model patents. In recent years, it has been continuously appraised as "advanced unit of scientific and technological innovation" by China Construction Enterprise Managem…

Copyright ? 2018 All Rights Reserved : CHINA COAL NO.5 CONSTRUCTION CO.,LTD

Platform: Design: