GB/T 21833.1-2020奥氏体-铁素体型双相不锈钢无缝钢管第1部分:热交换器用管标准
英文:Seamless austenitic-ferritic (duplex) stainless steel tubes and pipes—Part 1: Tubes for heat exchanger GB/T 21833.1-2...
英文:Seamless austenitic-ferritic (duplex) stainless steel tubes and pipes—Part 1: Tubes for heat exchanger GB/T 21833.1-2...