CSA-Z245[1].20-98(钢质管道熔结环氧树脂外防腐层)
CAN/CSA Z245.20-98External Fusion Bond Epoxy Coating for Steel Pipe 钢质管道熔结环氧树脂外防腐层CAN/CSA Z245.21-98
CSA-Z245[1].20-98(钢质管道熔结环氧树脂外防腐层)
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CSA-Z245[1].20-98(钢质管道熔结环氧树脂外防腐层)CSA-Z245[1].20-98(钢质管道熔结环氧树脂外防腐层)CSA-Z245[1].20-98(钢质管道熔结环氧树脂外防腐层)