ABB (Hong Kong) Limited
ATAL Engineering Limited
Bun Kee (International) Limited
BYME Engineering (Hong Kong) Limited
Fook Loong (HK) Limited
Fortune Links Hong Kong Limited
Kembla (Hong Kong) Limited
Kinetics Noise Control (Asia) Limited
Link The Best Company Limited
McQuay Air-conditioning Limited

Midea Electric (Hong Kong) Limited
O-Link Limited
Oxprime (International) Limited
REC Engineering Company Limited
REC Green Technologies Company Limited
Southa Technical Limited
Superpower Pumping Engineering Company Limited
The Hong Kong & China Gas Company Limited
Tin Sing Chemicals Engineers Limited
Trane Hong Kong

Victaulic
Winston Air Conditioning & Engineering (Hong Kong) Company Limited
Young's Engineering Co. Ltd.
Zenith International Enterprise Limited