What major does the entrance door belong to?

The entrance door belongs to carpentry, which is a craft and a unique technology.

Ancient woodworking tools include chisels, saws, planers, axes, shovels, drills, Mo Dou and other traditional woodworking tools. In ancient times, buildings, furniture and other wooden structures were tenon-mortise structures, with concave-convex connection. The protruding part is called tenon (or tenon); The recessed part is called the socket. This connection method does not need any nails. With the development of science and technology and people's needs, woodworking tools are divided into electric tools, pneumatic tools and hand tools. Modern carpentry mainly includes chainsaw, planer, electric drill, curve saw, edger, air compressor, level meter, nail gun, portable saw and so on.