Adjustable protective guard for house building construction von LI REN, YANG PEICHUAN, WANG XIAOYA, YAN LONGLIANG, ZHANG XUETONG, DU HAORAN, ZHANG ZHIQIANG, CHEN YUCONG, ZHOU ZHANFENG, ZHANG PENGSONG, GUO WEILI, CHENG XIU, DING LEI, DENG HUAN, BAN YONGZHANG, WAN HAILI, YAN CHENFEI

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