Manufacture & Export of #Company Introduction Since humans discovered fire in the distant past, the use of fire has made human life convenient and abundant, and has been a catalyst for the development of human civilization. Humans have been constantly researching to use this precious fire more efficiently and conveniently. It has been developed in the order of vegetation - firewood - charcoal - coal - oil - gas - electricity. Electric heat is the most convenient, safe, efficient, and non-polluting heat source in our lives, and it is a fundamental element in all industrial fields. Sangdo Electric Co., Ltd. has been producing only heating elements for over 50 years. Recently, it is suitable for use in difficult environments due to the newly developed special alloy heating tube material, insulating material with excellent performance, advanced manufacturing facilities, and non-destructive X-ray inspection equipment. We have become accustomed to efficiently producing reliable heating elements, and we are fully prepared to develop elements for any purpose that consumers need.