GB/T 12459  弯头 DN 1200-Ⅱ-890EL

DN 1200-Ⅱ-8 90EL

WN80-600Rf0

WN 1000(B)-10RFF4020rf16RFfr sàS

WN 80-150 RF S=6SCH40S0RF40O@40

BL200-150RF3316RF

PL32(B)-16 RF��°H=30=1

WN 100-1500fm16ff b=450-1F S=4

PL 500(B)-16 RF8025so16RF8

SO32-300RFB=32FH-mH80S11F RFF6RF=

WN300-10 R