May Day PPT, with blue sky and white clouds as background map, it is vibrant, and detailed description of the source of Labor, there are many good place for tourism, exciting content not to be missed!
五一劳动节ppt，用蓝天白云做背景图，显得朝气蓬勃，内容详细的介绍了五一劳动的来源，还有许多旅游的好去处，不容错过的精彩内容！
The detecting depend on manual labor has many drawbacks, by which there is high rate of missed detection, low efficiency and low reliability.
依靠人工的检测存在着劳动强度大，效率低，漏检率高，检测结果易受检验人员主观因素影响等弊端。
Labor day picture material PPT, so many wonderful pictures about labor material, each a special festival, not to be missed!
劳动节图片素材ppt，非常多精彩的关于劳动的图片素材，每一张都特别喜庆，不容错过！
This is a most glorious May Day labor class meetings PPT, with maple leaf as a background, it is very fresh, a detailed description of the origin of May Day, not to be missed!
这是一个关于五一节劳动最光荣的主题班会PPT，以枫叶作为背景，显得非常清新，详细的介绍了五一劳动节的由来，不容错过！
This is a most glorious May Day labor class meetings PPT, with maple leaf as a background, it is very fresh, a detailed description of the origin of May Day, not to be missed!
这是一个关于五一节劳动最光荣的主题班会PPT，以枫叶作为背景，显得非常清新，详细的介绍了五一劳动节的由来，不容错过！
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