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| Dutch | English |
| marges spiegelen | mirror margins (Margins of the left page are a mirror image of those of the right page. That is, the inside margins are the same width, and the outside margins are the same width) |
| totale marge | total slack (The amount of time that a task can slip before it delays the project) |
| vrije marge | free slack (The amount of time that a task can slip before it delays another task) |