- Cv. Ricardo Alvin
- Fluke, Fluke Networks, Cable Analyzer, total station, trimble, embroidery machine, tools, tajima.
- Address:Jl.Sei Putih Baru No:32 Medan Sumatera Utara Indonesia
- Emporindo Mediatama Sejahtera, PT.
- Computer Hardware And Software, Structure Cabling & Networks, VOIP & Wireless, 19.
- Address:Graha EMS, Jl Prof. Dr. Latumeten Raya No. 17b, Grogol
- Ricardo Alvin Store
- total station, wireless modem, fluke networks.
- Address:Jl.Sei Putih Baru No 32, Medan, Sumatera Utara, Indonesia
- Pt Berkat Andijaya Elektrindo
- Air Conditioner, Distribution Networks.
- Address:Jalan Gunung Sahari Raya No 2, Kompleks Marina Mangga Dua Blok F No 12b
- Bhineka Mentari
- Roland Printing&Sign Making Machine, Numonics Digitizer, Caselogic Accessories, Best Software, Meteor Video Systems, Efficient Networks ADSL Modem, Extron PC.,Television.
- Address:Jl. Gunung Sahari Raya 73c
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