Certifikat for obligatorisk produktcertificering i Kina SGS-Borsilikat 3.3 (Høj temperaturbestandighed) SGS-FENGYANG TRIUMPH SILICIUM MATERIALS CO., LTD. SGS-Qinhuangdao Scinan Specialglas Co., Ltd. SGS-CE-Boro.4.0 SGS-Boro.4.0-EN 1748-1-22004