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I just can’t figure out the differences in the upper letter combinations for valve designations. For example, FV, FC, FT, FRC, FRCQ, FI

2020-10-17View Original

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I just can’t figure out the differences in the upper letter combinations for valve designations – for example, FV, FC, FT, FRC, FRCQ, FI
Reply #22020-10-17
Read HG/T 20505-2014 carefully

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