1, Huali Huali (top ten instrument brands, in 1970, China famous trademark, China famous trademark, Zhejiang famous trademark, high-tech enterprise, export inspection-free, Huali Instrument Group Co., Ltd.)
2. Samsung Electronics (a well-known trademark in China, a famous brand product in China, a high-tech enterprise, one of the largest electric meter manufacturers in China, Ningbo Samsung Electronics Co., Ltd., one of the top ten electric meter brands).
3. Chint (Top Ten Instrument Brands, National High-tech Enterprises, China Well-known Trademarks, China Famous Brand Products, Chairman of Zhejiang Zhengtai Instrument Watch Co., Ltd. Electrical Branch)
4. Weisheng (China famous trademark, China famous brand, top ten electric meter brands, China leading electric energy metering equipment system and service provider, high-tech enterprise, Hunan famous trademark, Weisheng Group Co., Ltd.)
5. Jenny (a high-tech enterprise specializing in the research and development of smart meters, a famous brand product in China, one of the most competitive enterprises in the industry, and one of the top ten electric meter brands, Jiangsu Jenny Electronics Co., Ltd.)
6.ABB (ABB (China) Co., Ltd., a global top 500 enterprise, a leader in the field of electric power and automation technology, and one of the top ten electric meter brands).
7. Siemens (Siemens (China) Co., Ltd., one of the largest electrical engineering and electronics companies in the world, one of the top ten electric meter brands, and a Fortune 500 enterprise).
8. Haoningda (Shenzhen Haoningda Instrument Co., Ltd., a high-tech Sino-foreign joint venture integrating scientific research, development, production, sales and service, a national high-tech enterprise and one of the top ten electric meter brands)
9. Great Wall Development (starting from 1985, one of the top ten electric meter brands, one of the domestic electric meter industry standard setters, the world's leading electronic product R&D and manufacturing enterprise, Shenzhen Great Wall Development Technology Co., Ltd.)
10, Kelu CLOU (national high-tech enterprise, Guangdong famous trademark, top ten electric meter brands, leading domestic power equipment manufacturer, Shenzhen Kelu Electronic Technology Co., Ltd.)