GB/T 12459  弯头 DN 150-690ESR Sch20

DN 150-6 90ESR Sch20

wn200-300 rf

WN25-1500 RJ B5.6rrf 2sRF S=5/5 δ0=10mrf sch/01000

SO 100(A)-16 RF5F

WN450-300 RF Sch406 Rsch40ch40/17/R

wn450-600 rj2fF0-5fi

BL80-40RFC0RF00-0sch/6S=4h=26R

PL40B-16RFH8fï؟½

BI700-S/5RF8d

PJ/SE 25(B)-16 RF20FF@