GB/T 12459  同心异径管 DN 50×25-Sch40RC δ=3

DN 50×25-Sch40 RC δ=3

WN40-150RF=10500RF5-400

BL400(B)-25 T)550

WN 50-300 RF Sch40SMï؟½8��

WN150-150 RF�“�F Sch40S120RF���âd

WN80(A)-25 RF25-150

SO500(B)-10 RF b=3

LWN100-1500 RJ B=150/0 N=

wn125(b)-16rf0S5

BL250(B)-25 FF Р“10