GB/T 12459  弯头 DN 450-Ⅱ-1890EL

DN 450-Ⅱ-18 90EL

WN 50(B)-100 RF S=66.5

WN450(B)-16RFR

WN 40(B)-16 RF S=5F B=12.550 RF Sch10SCH40S SFFR

SE200-16RFRFS5 RJ2A=F6m386@RFRFf sss.5 RJ2h1RM��00 LMұвҖҳШ°ЛҶШ°В°Шұ

3 FM 600-1.6M25M5 R0SRF6F4d9@45@0-10S

BL100(A)-16MRF0F

SO2