GB/T 12459  同心异径管 DN 300×125-Ⅱ-4RC

DN 300×125-Ⅱ-4 RC

WN 200(B)-16 RF S=3

BⅡ4200

3 RF 1000-2.5 δ0=8

PL1000-2.5 RF

WN 100-40 RF S=3S

HG/T20592 WN300-25FM

PL 80(B)-16 RF II

@WN800-16 FF0

WN 10-300 MS0e200 r����ch40S@t./0 mhRFSCh40S08602mpamp �amFf@4 rfmpâ�F0 RFS5 RJ0-0S=3-