What knowledge does the hardware industry possess?

What knowledge does the hardware industry possess?
The hardware industry is a broad field involving metal processing, manufacturing and sales. It encompasses the production and distribution of various metal products. Here are some important knowledge points of the hardware industry:
. Product classification:
- Tools: Including manual tools, electric tools, pneumatic tools, etc., which are widely used in construction, maintenance and manufacturing industries.
Building hardware: Such as door and window hardware, pipe connectors, fasteners, etc., are indispensable parts of the construction industry.
- Daily-use hardware: Involving locks, hinges, handles, etc. in daily life.
Industrial hardware: Such as bearings, gears, chains, etc., are key components in industrial production.