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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Abbr. on a gauge 3 letters:

MPH: Car gauge abbr.
PSI: Tire-gauge abbr.
PSI: Tire gauge reading (abbr.)
CPI: Market basket gauge of inflation (abbr.)
AMP: Abbr. on a gauge
PSI: Abbr. on a boiler's gauge