
BS ISO 1622-1. Plastics. Polystyrene (PS) moulding and extrusion materials. Part 1. Designation system and basis for specifications
出版:British Standards Institution

专家解读视频
BS ISO 1622-1. Plastics. Polystyrene (PS) moulding and extrusion materials. Part 1. Designation system and basis for specifications
出版:British Standards Institution
专家解读视频