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It is only a unilateral public toilet door handle through the door handle of the rotary device to change the position, so that is always at the hands of users is being used on this side; is mainly to prevent other users to open the door . The other side is marked "in use", people quickly recognize. As a protective current user's security.

University

National Cheng Kung University

National Cheng Kung University
Tainan City, Taiwan

Yu-Ming Chang

Design

Chang, TsungYu

Chang, TsungYu
TAINAN, Taiwan