GB/T 12459  弯头 DN 100-Ⅱ-690ES

DN 100-Ⅱ-6 90Es

BL500-300TF000=800rJFn71s/@0s-14010uî´)-1-1.03RFS=10& N=0-1

PL25(B)-16 fF BB=28.5r

PL250-10 RF HG/T20

DN 50-Sch30 45EL625F=5 f2=43 T

PL40A-6RF16rf00 Sle

3 FM 1900-1.6 δ0=16

Lwn25-300 rf/ampampam

SO40-600T0rrf0S25F0012Sch0

SO25B-