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This product is mainly designed to solve the smokers in the absence of an ashtray
can well solve the problem of ash handling, This product USES simple geometric forms, it is no use of the cigarette case whenwe use no difference, when open the back stretch box produced by it can be convenient to solve smokers placement
of ash, soot and litter problem, also better protect public environment and public health.
Yanshan University
Hebei-Qinhuangdao, China
Yanshan University
Hebei-Qinhuangdao, China
Heng Yu
Qiqian Sun