GB/T 12459  同心异径管 DN 500×400-Ⅱ-3RC

DN 500×400-Ⅱ-3 RC

wn15(a)-40 m4

DN 400×150-Ⅱ-3 RC

WN 1"-150 RF Sch40

WN 250(B)-16 RF S=60-10 ff bcF M0-1@RF5 RJ-Rb/60-�gF0-10 ff bcF M0-1@RF5

WN 600-10 RF S=12

DN 400×250-Ⅱ-3 RC

DN900-PN2.5 PL FF Ⅱ

DN350-PN25 LWN RF@470 RF0-10

PL 65