GB/T 12459  同心异径管 DN 950×10-Ⅱ-5RC

DN 950×10-Ⅱ-5 RC

WN 10-300 T Sch10SF Sc.m2=3=rRF

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WN200A)-150RFRFFrfaF1Ã-0.6/5-16 RFrf

47065.2 A4-

WN80-