HG/T 20592  法兰 PL 200(B)-40 RF25 RF�1=1

PL200(B)-40 RF25 RF�1=1

PL 20(B)-16 RFF2)F6 rf

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SO20(B)-16RF

SO100-300 T S=6.5

PL 20(B)-16 RF

WN 15-150 RF Sch40S

WN 100-25 RF)5 RFF S=5 Sch8S

TH(NPT)65-16 RF

1 FM 450-1.6Sch40a(4-1