GB/T 12459  弯头 DN 80-Ⅱ-990ELF4RFF0RF=6R

DN 80-Ⅱ-9 90ELF4RFF0RF=6R

LWN300-600RF H=353 B=290.0RF

wn50b)-25mF1-8 DN=100080sRF0-1=14.2L=2

BL 50-25 RFF S

WN50B-63RF S=3F)-/F/

BL500-16 RF

PL600(B)-6RFD=°wn50(b

WN250(A)-25T/pampampa

hg/t20615-2009 so250-150rf=0 RFSRF/f5110RFF2009/16 fRFL5

S