GB/T 12459  弯头 DN 250-Sch8090EL δ=8.9

DN 250-Sch80 90EL δ=8.9

a 16010rf R15╨▓Γ�ext-overtex

SO25-16RFL80-16RF48(B

PL450(A)-16 RF f1=2

PJ/RJ100(B)-6 RF

WN 25(B)-16 RF4060fc6m386@Sch400Ff sch60sm

lwn 20-150 rf100-12-516 rf-1.=-BSch80S

3 FF 1200-1.0202K=l21R

WN 32(A)-16 RF S=3.2

so40