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底部的數字點解?

我見到水壼底部,有一個三角形的圖形,中間寫住一個6字,呢個數字點解?有d其他水壼則寫住3、5等等......佢地有咩唔同?

By alex yu  (pupil) on 2010-01-05  Answers 3   Views 136

i can answer
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By wushukhan on 2010-04-30

塑料區別.........代表該款塑料的耐熱性

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By apple lai (middle-school student) on 2010-02-10

其實個數字仲係為左辨識所使用的包裝材料種類,加速回收的效率,國際上一般規定外銷或自國外輸入的產品,其使用的塑膠包裝材料均應標示這項標誌。

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By jack ng (pupil) on 2010-02-10

你見到的應該係塑膠包裝材料回收標誌,是以三角形回收箭頭作為基本圖案,並在三角形圖案內分別以阿拉伯數字1至7代表各種不同種類的塑膠材料。

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