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welding of SMA490BW plate for boiler drums
welding of SMA490BW plate for boiler drums
- Comments: Weathering steel for welding structure is added a small amount of alloy elements to the steel, such as steel, chromium, nickel, molybdenum, niobium, titanium, zirconium and vanadium, to form a protective layer on the surface of the metal substrate. Theref
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