上海當年有所中學的校辦工廠，用比較上好的白硬版紙做遊標卡尺，遊標用透明有機玻璃製成，賣給學生用蠻好的。

來源: 明初於 2023-03-20 11:11:42 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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