A perforation, as in a punched card or paper tape.

在穿孔卡片或纸带上穿孔的一种动作。

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Cotton paper tape , fiber tape , PE protection film.

棉纸胶带，纤维胶带，PE保护膜等。

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Make up an example like those in (c) and draw the paper tape.

编一个类似(c)题的例子，并绘制成纸带图形。

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Make up an example like those in (c) and draw the paper tape.

编一个类似(c)题的例子，并绘制成纸带图形。

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