三个直角，四个１３５度的内角，两个１３５度的外角。都是那个ｂａｙ　window惹的祸。若是４个直角就好做多了。

来源: Baritoner 于 2020-09-14 11:58:50 [旧帖] [给我悄悄话] 本文已被阅读：次

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