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1·Secondly, the identifying model of freeway hazardous location in mountainous areas was established based on BP neural network.

其次，建立了基于BP神经网络的山区高速公路事故多发点鉴别模型。

2·These hazardous location cable glands and strain relief fittings are made of high performance nylon and can be ordered in either blue or black colors.

这些危险场所电缆密封套管和插头由高性能的尼龙材料制造而成，且颜色有蓝色和黑色两种可选。

3·Based on the comprehensive analysis of the definition of hazardous location at home and abroad, this paper defined the hazardous location in mountainous area.

综合分析国内外对事故多发点的界定，确定了山区高速公路事故多发点的定义。