EC118

Wai Lee Engineering Co., Ltd.

Invalid

EC128

Tactful Building Co. Ltd.

Invalid

EC138

World Diamond Engineering Limited

invalid

EC228

W.M. Construction Limited

valid

EC429

Great Top Engineering Ltd.

valid

EC888

Yee Hop Engineering Co., Ltd.

Invalid

EC999

Urban Recycling Co., Ltd.

Invalid

OC001

Pyrofoe Engineers Ltd.

Invalid

OC002

Shan On Engineering Company Limited

Invalid

OC003

Fai Tak Engineering Co., Ltd.

Invalid

OC004

Welcome Construction co., Ltd

valid

OC005

Guardian Fire Engineers and Consultants, Limited

Invalid