Electrical fitting with water plumbing

Electrical wiring and fitting

電線鋪設及電器裝設

Fire alarm and fire fighting equipment, installation and maintenance

火警及滅火設備安裝及保養

Anti-burglar system, installation and maintenance

防盜系統安裝及保養

Intercommunication system, installation and maintenance

閉路通訊系統安裝及保養

Telecommunications equipment, installation and maintenance

電訊設備安裝及保養

Combined and other installation and maintenance of electrical and mechanical equipment

綜合及其他電器及機械設備安裝及保養