GB/T 12459  弯头 DN 150-Ⅱ-390EL-10RFFCH40S0 S=

DN 150-Ⅱ-3 90EL-10RFFCH40S0 S=

WN 125(B)-16 RF S=60rf

PL20(a)-6FF33 n=8 C16003RS

PL800-300RF S=4.0ch401.0C=45 C=4.7 k=79.4 l=16 bbRF/

3 RF 1000-6.4 δ0=20F32100s0 B1=714 n20h=1003/u00M

A BL 42"-600 RFs2b=38 k=65h40 RF Sc16 RFR2F

WN25-63FM50 rf