Is a high molecular weight synthetic resin as the main component, under certain conditions (such as temperature, pressur···
A rubber material whose main chain consists of alternating silicon and oxygen atoms, usually connected by two organic gr···
It is the process of connecting electronic components according to specific design requirements to form a circuit struct···
It is the process of combining various parts into a complete product according to the design requirements and process fl···
It refers to the use of containers or external bandages to cover goods to meet the operational process of decoration, be···
