The above results have important reference values to establish speed-limit standards and road limit segmentation methods of mountainous expressway in China.
上述研究成果对建立我国山区高速公路限速标准和限速路段划分的方法具有重要的参考价值。
Many countries had paid more attention to limit standards of heavy metals in food, and there are more and more studies on analysis and detection of heavy metals.
由于重金属超标对人体健康会产生极大的危害，世界各国日渐重视食品中重金属的限量标准，同时对重金属的分析检测方法研究也越来越多。
Objective To explore the correct application of risk assessment technology and provide scientific evidence for the establishment of limit standards for chemical hazards.
目的探讨危险性评估技术在化学性危害的危险性评估中的合理应用，为进一步制定有关限量标准提供科学依据。
Objective To explore the correct application of risk assessment technology and provide scientific evidence for the establishment of limit standards for chemical hazards.
目的探讨危险性评估技术在化学性危害的危险性评估中的合理应用，为进一步制定有关限量标准提供科学依据。
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