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Symbol | Definition |
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≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |
The ounce per (cubic inch) is the unit of density, symbol is oz/in3.
The pound per US gallon is the unit of density, symbol is lb/ US gal.