The sheet material for blister packaging is called hard film or film, commonly used are: pet (polyethylene terephthalate) hard film, PVC (polyvinyl chloride) hard film, PS (polystyrene) hard film. P
The latest goods trade barometer released by the World Trade Organization (WTO) shows that the growth of global commodity trade at the beginning of 2020 still looks weak without taking the relevant
1. Optimize product structure and build brand awareness
Expert opinion:
Wu Xiaobo: we have moved fro
PC lens and resin lens have the following differences:
1. quality
PC lens is lighter, which is one o
