阀门标准 BS 5351-1986 Specification for steel ball valves for the petroleum, petrochemical and allied industries.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]
