保护面积：报警器安装高度6米以下，保护面积为60平方米。
Protecting area: mounting height of the alarm is lower than 6 meters, protecting area is 60 square meters;
分析了点型探测器“保护半径”与“保护面积”的内在关系，得出了以尽量趋于正方形设置为善的结论，并将按“面积”设置纳入受保护半径的制约；
The paper analyzes the internal relations between "protected radius" and "protected area", and comes to the conclusion of installing the detector in square;
还提出研究中国自然保护区中人口、中国国土面积及分类和中国各种类型土地的适宜保护面积，探讨“在中国多大的国土面积可以建设为自然保护区?”
I also preliminarily studied human population, landscapes type of nature reserves to discuss suitable portion of strictly protected area in forests, grasslands, wetlands, desserts in China.
还提出研究中国自然保护区中人口、中国国土面积及分类和中国各种类型土地的适宜保护面积，探讨“在中国多大的国土面积可以建设为自然保护区?”
I also preliminarily studied human population, landscapes type of nature reserves to discuss suitable portion of strictly protected area in forests, grasslands, wetlands, desserts in China.
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