名词
中文翻译：脊梁尺
同义词：
['crestline', 'spine scale']
例句：
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1.The crest scale of the mountain is visible from the top.
从山顶可以看到山脉的脊梁线。
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2.The surveyor used a crest scale to measure the height of the cliff.
测量员使用脊梁尺来测量悬崖的高度。
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3. The crest scale was used to mark the starting point of the race.
脊梁尺被用来标记比赛的起点。