Compared with the prior art, the rolling outlet guide board guides the rolled pieces accurately, the rolled pieces enter the hole shapes of rolls easily, and the quality of the rolled pieces is high.
和已有技术相比，本实用新型对轧件导引准确，轧件易进入轧辊孔型，轧件质量高。
X-rays enter the box through a small hole that in turn focuses them, like an old-fashioned pinhole camera.
射线通过一个小孔进入盒子，从而集中成一束。就像以前的针孔照相机。
To enter the black hole: they reflect the feeling of being someone suddenly into a dark space.
进入黑洞：有人反映他们感到被突然拉入一个黑暗的空间。
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