GB/T 12459  同心异径管 DN 900×10-Sch100RC-1paL-250(a)- f1=3 b=

DN 900×10-Sch100 RC-1paL-250(a)- f1=3 b=

wn50(B)-600RJScH80s6-1Ff0.25-0.6

bL80-10RF B

SO 600(B)-16 RF80b-0 �

BL 65-63 RF

PL80-16RF b=0F0-Fh040-=80 H=4

Bl450-16rf1001HGCAD论坛

BL200(A)-6RF

pl 32b-16 RF b RF1RFom/@6F RFSM0 R1RF@40@40HF@40@40H4l rf