GB/T 12459  弯头 DN 300-Sch4090ELsch4F6s-600

DN 300-Sch40 90ELsch4F6s-600

BL500-10 MF)S500-2000-152715

pl 80(b)-25 rf/am=16 /u00c3/u0083

wn300(b)-300 rf sch80s

SW 15-300 RF=mpaRF0-106 RFF(b)-10F25Lh80)-25rf RF

WN600-300 RF A=68081/180-320f6F1900-0.69

WN25(a)-63 RF B1=4601.5F SCH406F0SF)-10RF

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