GB/T 12459  弯头 DN 250-Ⅱ-Sch4090EL

DN 250-Ⅱ-Sch40 90EL

WN10-16FF

WN150-900 RJ A=182.3 S=18

WN500-300 RF ASME B16.5

WN400(A)-10 RF S=5

wn80(b)-40 rf nb=64 r=6 undefined=76 h1=7

bl350-10 rf c=28

WN500-300 RF B=464

bl50-150rf、

WN50-150RFF36.0RFr0fsc12n50(b0 S�2.7�‚¢�