| 摘要 |
A combination level and square includes a straight generally rectangular first level including a number of attachment elements and a cavity defined therein. It further includes a straight generally rectangular second level including a number of attachment elements adapted to cooperatively engage with the attachment elements of the first level, such that the first level cavity is dimensioned to releasably receive the second level therein, such that the level can be placed in nested position. Preferably the attachment elements are so arranged that the two levels can further be placed in a long position, a square position, a t-square position and an angled position.
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