GB/T 12459  等径三通 DN 40-Ⅱ-4.78TS0-4.0M01.6ฒ

DN 40-Ⅱ-4.78 TS0-4.0M01.6ฒ

WN 400-150 RF/)-100fF2(BRF(B

SO25(a)-6RF HG/S/

47065.2 B6 B790725 RFB-4-

PL 150(B)-10 RF50RRF S10(B)0S50

WN 80(B)-16 RF511FM0sFF.8/122 h

1 RF 500-1.6 δs=6Ff-s4Sch10-13-10RFpam

47023RF400-2.5/FPSSch40S/t910084080 n

bl10