ENERCON
GE Renewable Energy
Goldwind Science and Technology
Siemens
VENSYS Energy
ABB
Anhui Hummer Dynamo
AVANTIS Energy
Bora Energy
Foshan Ouyad Electronic
Leitner AG
Mervento
Qingdao Hengfeng Wind Power Generator
Qingdao Richuan Precision Machinery
ReGen Powertech
XEMC Windpower.