-perawatan serta perbaikan alarm api serta alarm gas (installation, maintenance and repair of fire alarms, -perawatan serta perbaikan aparatus pendingin (installation, maintenance and repair of cooling, (construction), (installation, maintenance and repair of measuring and testing machines and instruments); Instalasi -, (installation, maintenance and repair of telecommunications apparatus and instruments); Instalasi -, accessories for electronic machines and apparatus); Instalasi -perawatan serta perbaikan aparatus, and gas alarms); Instalasi -perawatan serta perbaikan aparatus serta instrumen telekomunikasi, aparatus elektronik (installation, maintenance and repair of electronic machines and apparatus); Instalasi, aparatus pembeku (installation, maintenance and repair of freezing machines and apparatus); Instalasi -, apparatus); Instalasi -perawatan serta perbaikan aparatus serta aksesori pendingin udara untuk mesin, apparatus); Instalasi -perawatan serta perbaikan penghilang kelembaban (installation, maintenance and, equipment); Instalasi -perawatan serta perbaikan mesin serta instrumen pengukuran juga pengujian, Instalasi - perawatan serta perbaikan mesin serta aparatus distribusi juga kontrol daya (installation,, instalasi -percwatan serta perbaikan (installation, maintenance and repair services); Konstruksi, maintenance and repair of apparatus for ventilating); Instalasi -perawatan serta perbaikan mesin juga, maintenance and repair of power distribution or control machines and apparatus); Instalasi – perawatan, of electrical wiring and electrical wiring systems); Instalasi -perawatan serta perbaikan aparatus -barangbarang juga peralatan listrik (installation, maintenance and repair of electrical apparatus, items and, pendingin udara (installation, maintenance and repair of air conditioning apparatus); Instalasi -perawatan, perawatan serta perbaikan alat listrik (installation, maintenance and repair of electric appliances); Jasa, perawatan serta perbaikan aparatus penerangan (installation, maintenance and repair of illuminating, perawatan serta perbaikan meteran serta penguji listrik juga magnetik (installation, maintenance and, repair of dehumidifiers); Instalasi -perawatan serta perbaikan aparatus untuk ventilasi (installation,, repair of electric or magnetic meters and testers); Instalasi -perawatan serta perbaikan mesin serta, serta aparatus elektronik (installation, maintenance and repair of air conditioning apparatus and, serta perbaikan aparatus pemanas (installation, maintenance and repair of heating apparatus); Instalasi, serta perbaikan pengkabelan listrik serta sistem pengkabelan listrik (installation, maintenance and repair