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

Crossword clues for Pump spec. 3 letters:

REG: Gas pump spec. that's an anagram of 60-Down
REG: Gas-pump spec
REG: Pump spec.
REG: Lowest-octane gas-pump spec.
EEE: Spec for some pumps