GB/T 12459  弯头 DN 450-Ⅱ-1090EL

DN 450-Ⅱ-10 90EL

WN75-600RFh600@b4=FF900-1.08ï؟½h40ShRF5 RJcRF150

BL25(B)-16FF5S CZ3457 Cqq1Wlf7/2.5/50-

BI 900 sch4000(B)-10(B)-10RFu

WN0-300 RF Sch6 RF300 RF Std9@45@0-10Sh8F SCH40a0 RF Sch

WN RF 10K 50A Sch40S/ R013-HG/5 rf0/m-pa2.5

PL450B-10