Visual intercom indoor unit based on practicability
SUN PINGFANG, ZHU SHENGQIANG, LIANG ZHIQING, WANG XIAOQING, WANG GANG, ZHAO JIHUI, YE LINFENG, LIU HUATANG
Year of Publication 01.03.2022
Get full text
Year of Publication 01.03.2022
Patent
Four-wire switchable type high-definition entrance machine
SUN PINGFANG, WANG XIAOQING, WANG GANG, WEI GUIXING, HE ZICHAO, CAO LIN
Year of Publication 01.01.2021
Get full text
Year of Publication 01.01.2021
Patent