GB/T 12459  弯头 DN 40-Ⅱ-490ESF500

DN 40-Ⅱ-4 90ESF500

WN 300(B)-40 RF S=5

PL100(B)-16 RFFMRN@ch4reFL0@S5 RJrvG5RF6Sc250 RF Brj&@r.6/6b¬

WN 2"-900 RF Sch40S

BL10-63 RF0230-10rf sF6

PL 150(B)-16 RF4&a

SO 8"-150 RF

WN 125-100 RFF5@PRFFR0-1@amp30-1=7th0ER RJ

WN 300(B)-25 R