In the 1920s, europeans made originally of cylinder washer, but when the general public is not completely trust new technology, socks and underwear will be assured in the washing machine, etc.

• 1920年代，欧洲人制造了最初的滚筒式洗衣机，但当时一般市民还未完全信赖新的科技，不放心将袜子和内裤等放进洗衣机。