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Wenzhou City, CN
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last 30 patents
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Patent Application
Trench construction device for construction sites
Publication number
20210172148
Publication date
Jun 10, 2021
Qianhan Zhuang
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Patent Application
Descaling apparatus for steel tubes of the building scaffold
Publication number
20210131126
Publication date
May 6, 2021
Qianhan Zhuang
E04 - BUILDING