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DavidB4-bot

→‎top: clean up & uniformity

Aschlafly

Reverted edits by JohnF31 (Talk); changed back to last version by Masterbratac

JohnF31

no edit summary

Masterbratac

bolding title, undeadend

Aschlafly

New page: Thermal efficiency is a measure of the efficiency of converting a fuel to energy and useful work: useful work and energy output divided by higher heating value of input fuel times 100 (for...