What are the technicians, general workers and installers in the construction industry?

In the construction industry, all naming majors belong to technical jobs.

Have the following technical work:

Civil engineering: steel workers, carpenters, masons, scaffolders, painters, etc.

Installation: plumbers, assemblers, electricians, welders, riveters, sheet metal workers, ventilators, assemblers, materials workers, etc.

There are also some jobs with special professional skills that are not included, such as measurement and flaw detection;

On the construction site, installation and civil engineering jobs should be used together.

Ordinary workers are the simplest, that is, handyman workers who do odd jobs such as loading and unloading, handling and digging.