2013
time:
2023-03-24 09:27
source
In 2013, he became a council member of hebei provincial environmental protection federation and won the technological innovation fund award for small and medium-sized scientific and technological enterprises in hebei province. Obtained the grade iii qualification certificate of environmental protection engineering professional contracting, and became the core member of the national urban infrastructure chamber of commerce.
How to clean up the MBR membrane module
2019-04-19
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