What are the more mature vacuum furnace manufacturers in China?

Mainstream brand manufacturers: Shenyang Vacuum Technology Research Institute, Beijing Qixing Huachuang Co., Ltd., Jiangsu Fengdong Heat Treatment Co., Ltd., Beijing Huahai Zhong Yi Industrial Furnace Co., Ltd., jinzhou area Electric Furnace Co., Ltd. Foreign manufacturers: German ALD, American Ipsen, French EMC, American Consar, American retech, Austrian Intech, etc.