GB/T 12459  弯头 DN 50-Sch80S45EL6 RF2 b=100.8=106

DN 50-Sch80S 45EL6 RF2 b=100.8=106

47023 -fm800-2.5ã BB=00B-16RF010mpampa

SO500B-25RF b=69pl1000S=1(

LWN 600(B)-16 RF S=12 S=5c92h1F0

so 20-40 tgF6rf sch202.0/(.79F-H0 RF Sc08S1=9RF25r

SO 40(B)-16 RF0-3000(500-0=39aw0-021055

WN100-1500 RJ SHC80S

WN