GB/T 12459  弯头 DN 32-Ⅱ-590ELS211

BL 500-150 RF0S0RF/ф▓�F

DN 32-Ⅱ-5 90ELS211

wn40)-10 rf59@bi1F-sch rf sch40s)-16RFRFw

pl80(b)-16 rf ,hg/-1.0 Sch4= RF)r

WN350(B)-25 M S66/u Sch40000M00-16/RF

WN50-40RF S=6.5 sch45mm60(b)-/ Sch80S16

WN15-600RF

WN40(B)-16RF，S=4

WN25-600RF