- Kingston Precision Limited
- Address:Room C1, 12 / F, Kwai Shun Ind Centre, 51-63 Container Port Road. , Kwai Chung, N. T.
- Screw Technology Co., Ltd
- Address:7 / F Kin On Commercial Building, 49-51 Jervois Streeet, Sheung Wan
- CBM Technology Co., Ltd
- Address:Rm. 502, Arion Centre, 2-12 Queen's Rd. West Hong Kong
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