Q: it's said that the video website You Tube is blocked in China.
问：据说Youtube视频网站在中国境内被屏蔽。
It is put forward in this article that the cross section deformation index Q can be used to evaluate the inhomogeneity of deformation in tube drawing.
为评价管材拉拔中的不均匀变形，提出用管材拉拔前后截面形状变化指数Q描述截面变形的不均匀性。
Look for simple shapes like a matchbox, or the lid of a tube of toothpaste, a q-tip.
找一些类似火柴盒简单形状的东西，或者牙膏盖之类。
Look for simple shapes like a matchbox, or the lid of a tube of toothpaste, a q-tip.
找一些类似火柴盒简单形状的东西，或者牙膏盖之类。
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