GB/T 12459  弯头 DN 20-Ⅱ-5.590EL

DN 20-Ⅱ-5.5 90EL

DN 250-Ⅱ-6 90EL

BL 20(B)-10 RF

PL300(B)-10m

1 RF 900-0.6=261.5dF

WN700-300 RF S=10

3 FM 1700-2.5 δ0=Sch40S

WN 25-600 FM Sch40S

PL200-10RF

WN 18"-150 RF S=15.90.5t/invokF-1.0RFRF02.5 RJ-RР“RJ5.5brj&@8 R01S4mRRFF-300 RF RF