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Safe welding tool

by SUN XINMEI
Year of Publication 17.02.2016
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Patent

Safe punching device

by SUN XINMEI
Year of Publication 10.02.2016
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Patent

Punching device

by SUN XINMEI
Year of Publication 03.02.2016
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Patent

Welding tool

by SUN XINMEI
Year of Publication 27.01.2016
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Patent