GB/T 12459  同心异径管 DN 250×200-Sch120RC5Sch40ot

DN 250×200-Sch120 RC5Sch40ot

PL150(B)-10 RF B=130

SO 18"-150 RF0RFr0 FF ffse

wn400-40 rf40S3=76=6316 D=2.60RF=116rfd.0/S=1rfsm-15

SO 600(B)-40RFG10-rf=80RF=6F4010SS=

WN50-150 RF S=3.6

a wn900-900 rf s=10 s=

WN25-2500FM B=25.7

SO150-10RF055Fsch=