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SNV 24560-1937 《管道 带有 J1v 凸起部分,J1r 弯头的预焊接法兰,适用于熔焊 ND 250,NW 10至40》.pdf
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SNV245601937
管道
带有
J1V
凸起
部分
J1R
弯头
焊接
法兰
适用于
熔焊
ND250
NW10
40
PDF
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