GB/T 12459  同心异径管 DN 40×20-4RC

DN 40×20-4 RC

SOP FF 10K 200A00-17�ҹ δa

wn25(a)-16mfmMJSch80S-F2M0-20-1

2 CG 450-1.620δ1=6

WN100-150 RF Sch402510c59

WN 1 1/2"-300 RF S=100δ1=1

wn80-300g0-4.FRF162.52/06-150 RF/l2-230

SO80-150 RF B=63f3/0-f/@a wn1000-150 rfFF

NB/T47022 RF