GB/T 12459  管帽 DN 580-Sch80C-f90RFs=10-

DN 580-Sch80 C-f90RFs=10-

WN5"-150 RF Sch40H4FF150 rfRF8o=5-7-

WN50-300 RF Sch4002 S=12f6 wfpubl0 RFM/0RF6 RF S0B-6R

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WN 15-150 RF Sch800-

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PL150-25RFRF0rfrf2-2009F

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