GB/T 12459  弯头 DN 50-Ⅱ-445EL

DN 50-Ⅱ-4 45EL

bl40-160fmch40(b)-1

wn25(a)-100rj)-1

WN 200(B)-63 RFf00-0.6-0 scs

&ampampampampampampampampquothg20615 wn450-600rj&ampampampampamp

WN 500-300 RJ S=5

Pl25(B)-25 RFe0 g8 sch0m040N1

bl200(a)-6RF-150RF

47023 RF600-1.6 =52 H=113

WN2