阀门标准 EN 14141-2004 Valves for natural gas transportation in pipelines – Performance requirements and tests .pdf [db:摘要]
阀门标准 EN 1111-1998 卫生设备管件.恒温混合阀(PN10).一般技术规范Sanitary tapware – Thermostatic mixing valves (PN 10) – General technical specification.pdf [db:摘要]
