- Barride Optics Co.,Ltd
- Address:No. 19, Jiu Long Rond
- Spec Electronics Trading Co., Ltd.
- Address:Unit 1104, 11 / F, Tern Plaza, 5 Cameron Road, Tsim Sha Tsui
- ShanYing Electronic Weighing Appratus HongKong Limited
- Address:ChinaShanghaiNo. 2025 Huaxiang Road
- WanGo(HongKong)Trading Company
- Address:Unit D16, 11 / f. , Wang Tan Commercial Building, 97 Bonham Strand East, Sheung Wan
- Target Depot Limited
- Address:No. 60E Wong Nai Tun, Yuen Long
- CHIN YI ENTERPRISE
- Address:No. 8 Cheung Ho
- Yu Lung Scientific Co Ltd
- Address:Flat J, 28/F, Shield Ind Ctr, Tsuen Wan
- South star telecom
- Address:Shop 60a, 1 / F, Miradore Mansion, 54-64 Nathan Rd
- Bonpal Technology Co Ltd
- Address:6 / F, Shun On Commercial Building, 112-114 Des Voeux Road
- Primatronix Ltd.
- Address:21 / F. , Texaco Centre, 126-140 Texaco Road,
- Green instrument
- Address:Room 287, 7 / F Go Wah Building, 285-295A Lockhart Road, Wan Chai
- The fokai Optical instrument.co.,ltd.
- Address:Unit 1022-1032 Hong Man Industrial Centre, 12 Hong Man Street, Chai Wan Hong Kong
- Speed Fair Co., Ltd.
- Address:2907-8, Winsor House, 311 Gloucester Road, Causeway Bay
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