GB/T 21832.1-2018奥氏体-铁素体型双相不锈钢焊接钢管第1部分:热交换器用管国家标准
英文:Welded austenitic-ferritic (duplex) stainless steel tubes and pipes—Part 1:Tubes for heat exchanger GB/T 21832.1-2018...
英文:Welded austenitic-ferritic (duplex) stainless steel tubes and pipes—Part 1:Tubes for heat exchanger GB/T 21832.1-2018...