This standard specifies the classification and composition, technical requirements, test method, inspection rules and marking, packaging, transportation and storage of lightemitting diode (LED) changeable speed limit signs.
This standard is applicable to the changeable speed limit signs of expressway with LED as the lightemitting unit, but can be referred to by those in other roads.
定价: 492元 / 折扣价: 419 元 加购物车