2. Shengsihua frequency converter produced by Hefei Shengsihua Electronic Technology Co., Ltd.;
3. "Ousai" frequency converter produced by Anhui Ousai Electric Co., Ltd.;
4. Yihe Inverter produced by Anhui Yihe New Energy Technology Co., Ltd. ..
Are restorers and dentists the same concept? Where is the examination time and registration address of the two certificates? Th