JIS B2011-2004 Bronze gate globe angle and check valves(Amendment 1).pdf 未知 JIS B2011-2009 Bronze gate globe angle and check valves(Amendment 2).pdf 未知 BS EN 1171-2002 industrial valves-cast iron gate valves.pdf 未知 BS 5157-1989 Steel gate (parallel slide) valves.pdf 未知
