You indicate a stretchable section by drawing one (or more) 1-pixel-wide black line (s) in the left and top part of the border (the other border pixels should be fully transparent or white).

你可以在左部和上部使用1宽度的黑线来定义可伸缩的区域(其它边框必须是完全透明或者白色)。

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One-time line drawing can be directly completed on the steel pipe by the utility model with exact line drawing.

使用它能够直接在钢管上一次画线完成，而且画线准确，因此大量节省时间和材料。

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Mr Hwee Chong added: "It wasn't as easy as we thought. We went through many rounds of trial and error, painstaking drawing the masterpieces in one controlled line, by hand."

他还说，“并不像我们想得那么简单，我们经历了很多轮的反复试验，才艰难地控制住了一根线条，手工画出了这样的杰作。

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