KnownAreaUnit enum
服务的 AreaUnit 的已知值。
字段
| Acre | 英亩 |
| SquareCentimeter | SquareCentimeter |
| SquareDecameter | SquareDecameter |
| SquareDecimeter | SquareDecimeter |
| SquareFoot | SquareFoot |
| SquareHectometer | SquareHectometer |
| SquareInch | SquareInch |
| SquareKilometer | SquareKilometer |
| SquareMeter | SquareMeter |
| SquareMile | SquareMile |
| SquareMillimeter | SquareMillimeter |
| SquareYard | SquareYard |
| Unspecified | 未指定 |
