4321
Electrical installation
类第 4 级
项目
此类有 7 个项目
43211
Electrical wiring and fittings
Electrical wiring and fittings
43212
Telecommunications wiring
Telecommunications wiring
43213
Computer network and cable television wiring
Computer network and cable television wiring
43214
Satellite dishes
Satellite dishes
43215
Lighting systems
Lighting systems
43216
Security systems
Security systems
43219
Electrical installation n.e.c.
Electrical installation n.e.c.