GB/T 12459  弯头 DN 15-Ⅱ-290EL233=10sam0s90rum@�

DN 15-Ⅱ-2 90EL233=10sam0s90rum@�

BL 150-600 FM110�âRF sch4000rj

WN25-40RJ1rfБ∙F S50

WN FF 16K 50AF-000 RF/0S=(B)-10RF HG/9

DN 15-Ⅱ-2 90EL233=10sam0s90rum@�c12cMmRFl2

DN 25×20-Sch10S RC D=159

3 FM 500-2.5 δ0=8

BL50(A)-10FF

WN 600(B)-16