DIN 30660-1999 供气、供水及水暖设备用密封材料.家用设施金属螺纹连接用非硬化连接密封材料和聚四氟乙烯密封带
Sealing materials for gas and water supply as well as water heating systems - Non-hardening jointing compounds and polytetrafluoroethylene (PTFE) tapes for metallic threaded joints in domestic installations