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| Symbol | Definition |
|---|---|
| ≡ | 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 …) |
Megaliter per day is a unit of flow rate, equal to 1 000 / (24 × 3600) m3/s.
The US liquid gallon per day (symbol: GPD) is a the unit of volumetric flow rate equal to that of a US liquid gallon moving each day. It is equal 4.3812636388889 × 10-8 US gal lqd/d.