GB/T 12459  弯头 DN 20-Ⅱ-345ELR

DN 20-Ⅱ-3 45ELR

PL 600(B)-10 RF00-0.25

WN 32b-40 M=98R167

WN80-10 FMn600 RF2500 LT S

Wn50(B)-25fm xxs6 RFkSch

SO500-16FF0A80SchS5rf0 RFhh80s6-1.0�@F HGFRFhrj@5@P S

NB/T47022 RF300-1.6J0 dn=50

so50(a)-150 RF@4930)0950 R

WN 50-150 RF S=24

LWN25B-15