本文研制设计了适合冲压机械的红外光安全装置，此装置具有动作速度快、矩形光幕、故障异或逻辑自检等优点。
In this paper, an infrared safety device is developed to fit the for - ging press mechanism. The device has the advantage of quick action, square light screen and breakdown self check.
但话又说回来，如果他真的那么做了，我们的生活中就会少了一位伟大的恶棍，他通过杀死《暮光之城》男主角来宣布自己的回归并总能威胁到国家的安全。
Then again, if he had done that, we would have been deprived of one of the great villains, who announced his rebirth by ordering the death of Him From Twilight and went on to terrorise a nation.
聚苯乙烯球的大小可以被改变以适合散射特定波长的光，一种非常重要的可用于安全领域的特性，它能使材料被准确地识别。
The size of the spheres can be tailored to scatter particular wavelengths of light-a useful property for security applications in which it is important that materials can be identified precisely.
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