GB/T 12459  弯头 DN 50-Sch4090ELF sch400=0-30

DN50-Sch40 90ELF sch400=0-30

пҝҪpL500-25 RF

WN50-25RFS=36-RA=3

WN50-150GN/CH40 Sch80L RF ⅡRFFF

47023wn300-25fm58RFF Sch16H1

wn25(b)-25fm,s=3.501

WN65(b)-25 RF RS=630F/17Р6

JWN 125×300-2500 RF S=4.55

AWN 1500-600 RF00-2.5/pampampampam

pl50(b)-1