- Shanghai Xiang-Run Industry Co. Ltd
- Address:上海浦东å·æ²™è·¯5558å·, Shanghai, Shanghai, China
- Zhengzhou Nanbei Instrument Equipment Co., Ltd
- Address:Beihuan Road, Zhengzhou, Henan, China
- Yangzhou Huifeng Meter Co., Ltd
- Address:zhanggang, Yangzhou, Jiangsu, China
- Shenzhen Too-ray Technology CO., Ltd
- Address:303,NO.53The second road shuibei, Shenzhen, Guangdong, China
- Vitoma
- Address:Huizhou, Guangdong, China
- Dandong Yangguang Instrument Co., Ltd
- Address:Miaoling, Jiuliancheng Town, Zhenan District, Dandong, Liaoning, China
- Jinan Gaosheng Test Equipment Co., Ltd
- Address:No.250,YuanliuPark, Jinan City,Shandong Province,P.R.China, Jinan, Shandong, China