GB/T 12459  弯头 DN 200-7.0490ES00 LFM B=15.7606)-4

DN 200-7.04 90ES00 LFM B=15.7606)-4

SO400 - 16RF.6=F=8h4020/64

SO 250 -6 RF0(b)-16 rf0a2/u00c3/u008fT3h40f30ch8038F

WN20(B)-16 RF=60RFB=5

BL500)-40RFF=5=73.962-

so250(b)-10ff-1.6/8am Sc8000-1 WN

wn500(b)-600rf s=11200950SR.6

pl150a-6 rf2592-200900m