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Detection file

by ZHU HAICHEN
Year of Publication 03.02.2016
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Patent

Anti-scalding spoon

by ZHU HAICHEN
Year of Publication 03.02.2016
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Patent

Alarm bucket

by ZHU HAICHEN
Year of Publication 08.04.2015
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Patent

Stirring grease gun

by ZHU HAICHEN
Year of Publication 01.04.2015
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Patent