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Double-sided key / key

Double-sided key
Double-sided key

The hands of the Double-sided key have two parts,the large part of the hands and the key rotate together. When you open the
door or lock the door, as the key to turning the handle, its positive and negative form different patterns will tell you wether you
lock the door or not.

University

ZTE

ZTE
Shenzhen, China

fan yu

Design

lin, hanwu

lin, hanwu
wuxi jiangsu province, China

linhanwu