BS EN 1092-1-2007 Flanges and their joints - Circular flanges for pipes valves fittings and accessories PN designated - Part 1 Steel flanges.pdf 未知 JIS B2062-1994 Sluice valves for water works.pdf 未知 BS EN 12086-1997 建筑用绝热产品.水蒸气散发性能测定 (Thermal insulating products for building applications - Determination of water vapour transmission properties).pdf 未知