GB/T 12459  弯头 DN 20-990EL20 Sch40sS0320Ã��FArf SCH80SFFB10b

DN 20-9 90EL20 Sch40sS0320��FArf SCH80SFFB10b

BⅠ 1800-S/s15(B)0HS¥â

1 FF 1800-0.2520خ´s=10fM.0

WN25(B)-25 g/co160RF+S=

20592wn20-160RF/3ampq r80-°5

47021 C-RF 1500-0.25 S=30S

WN80-160RF B=73=32023 f

wn50-150rfrf RFFF/6 RF9100-3025

BI 100