GB/T 12459  弯头 DN 100-990ELo2

DN 100-9 90ELo2

WN 40(B)-10 RF

WN400B-40M

WN 25(B)-16 G S=3 RF Sch40S80SFch40SRFF6m386@RFRFf sss.5 RJ2h1RF6Sc2@RF@443RF@A@°F5@PF@443

LWN 3"-150 FF Sch40S

WN 16(B)-40 RFG

WN 2"-300 RF0 RF M

WN 25-150 RF WN

WN40-1500fmr0@R1class60

LWN 3/4&qu