Hengestone Holdings, Inc.
ZHEJIANG TUOHUA NEW ENERGYCO.,LTD.Zhejiang Sheng, China
WENZHOU WANYU PLASTIC CO.,LTD.Zhejiang Sheng, China
Drum Workshop, Inc.California, United States
Fuzhou Tianrui Wire Saw Technology Co., Ltd.
Rosin Chemical Wuping Co. Ltd.Fujian Sheng, China
Junzhan Enterprise Co., Ltd
Hunan Institute of Measurement and Testing
VITAL Innovations Ltd.United Kingdom
Shandong Chuanjun Chemical Co. Ltd.
Beijing Singu Keller Automotive Cold Forming Parts Co., Ltd.Beijing Shi, China
Bitumen Applied Research Ltd.