مناقصه عمومی دو مرحله ای فشرده تهیه ,BALL VALVE AND REPAIR KIT, METALIC BALL- .ACCORDING WITH API608 STANDARD MATERIAL FOR BODY: CARBON STEEL A216 GR. WCB - BALL: LOW ALLOY STEEL WITH 13% OR UPPER 30 IN CLASS 600 F-F= 1651 mm 8 IN CLASS 600 F-F= 660 mm 24 IN CLASS 600 F-F= 1397 mm 2 IN CLASS 600 F-F= 292 mm ٠۴ قلم - معادل ۰۸عدد