等高线轮廓线恒值线亦称作 contour level curve level line等位线轮廓线图等值线等深线
contour lines, contour lines, constant value lines are also known as contour levels, curve levels, contour lines, contour lines, contour lines, and depth lines
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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