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Box body housing

by YANG QUANFU
Year of Publication 23.08.2024
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Patent

Gear lower shield

by YANG QUANFU
Year of Publication 13.08.2024
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Patent

Alcohol barrel

by YANG QUANFU
Year of Publication 30.07.2024
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Patent

Bearing wheel frame

by YANG QUANFU
Year of Publication 01.12.2017
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Patent