发布时间:2025-01-22 12:22:23
相对高度的定义:亦称为假定高程。它是描述两个相邻地点之间的高度差。例如,如果一个山峰的海拔高度是2,000米,而附近地的海拔高度是1,500米,那么该山峰相对于附近地的相对高度就是500米。
热水器60l一般多久能热 热水器容量为60l时需要多长时间才能加热
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