鍛鋼 - 東光凡而工業股份有限公司
DESIGN DESCRIPTION: Seal Welded Bonnet Outside Screw and Yoke Wedge Disc Rising Stem and Non-Rising Handwheel Renewable Seat Ring Screwed Ends or Socket Weld Ends STANDARDS: Steel Valves : ANSI B16.34 End to End : Tong Kwang Standard...