GB/T 12459  弯头 DN 450-Sch40S90ELch40S-0

DN 450-Sch40S 90ELch40S-0

bl65-25fm

DN 50×50×40-Ⅱ-3 TR

PL25(B)-25 RF D=1

WN 200-600 RF H1=7 S=12.55

WN200(B)-100 RF S=16

pl150b-6rf d=180 b4

WN200B)-16RFHG/

3BWN800-300RF B=779f9150��8as025(A)

WN40(B)-100 FM S=5ampampampampampampampampamp;amp