GB/T 12459  同心异径管 DN 20×10-Ⅱ-3RCF110 d=68��0S0 b0@RFerF0�

47065 BI1400-F.S651S rf.6h RF

dn 20×10-Ⅱ-3 rcF110 d=68��0S0 b0@RFerF0�

HG/T20615 SO 40-150 RF.6/0S

wn 450(b)-25 rf s=10

BL100-600 RF H54-12F Sch4mpampampam

A BL10500-150 RFc6/u0092/�

BL 100(B)-40RF0B16/150-0

47023 FM400-6.4/68-132

SO40-150