GB/T 12459  同心异径管 DN 300×200-Sch40SRC-100 RJ9000h

DN 300×200-Sch40S RC-100 RJ9000h

PL65-10RF/

WN 80-150RF Sch.80S5 b=3��0 RFt

2 RF 1900-0.60MS=FSch85 b=3 f1�

pl65(B)-16rf205925/65F

WN20B-900Rj000ch40 TRc)--1.0s RF00T0SfF r

BL 300-40 RF AN

lwn 40-150 rf sch80s)sB)-10RF Sch

BL150(A)-150 RF/681