GB/T 12459  弯头 DN 500-Sch2090ELblH8RF16@40HЁ∙Rch

DN 500-Sch20 90ELblH8RF16@40HЁ∙Rch

WN40(B)-16 RF S=5

BL500(B)-10RF

WN300-25 FM

pl40(b)-10rf551shฝ RF0100(JFRJsRF@F S

bâ…Â500f/@WN100-150 RF S

WN300(B)-16RF S=12

NB/T47023 M1800-2.5

WN25-16mfF40s00F

SO 50(B)-16 GFSR00 LFMRF5 RJ-16=8G���