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Protective square cabin with handle disinfection function

Protective square cabin with handle disinfection function

by YUAN WENHU, MENG KUN, XIN XING, GAO CHANGNING, LIU XINCHENG, MA XIANGYANG
Year of Publication 17.01.2023

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Patent

Establishing method of reverse overseeding lawn

Establishing method of reverse overseeding lawn

by LU NI, LIU YUNHENG, GAO CHANGNING, LIU ZHAOHUI
Year of Publication 10.05.2017

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Patent

READING TABLE FOR CHILDREN (PROTECTOR FOR CHILDREN VISION)

READING TABLE FOR CHILDREN (PROTECTOR FOR CHILDREN VISION)

by GAO CHANGNING, LIU SHIPING ET AL
Year of Publication 21.12.1988

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Patent