名词
中文翻译：液压等级线
同义词：
['hydraulic level line', 'hydraulic grade plane', 'hydraulic grade plane line']
例句：
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1. Theengineer used a hydraulic grade line to measure the depth of the water.
工程师使用液压等级线测量水深。
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2.The construction crew used a hydraulic grade line to mark the boundary between the two sections.
施工队使用液压等级线标记两个部分的边界。
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3.The hydraulic grade line was crucial in determining the safest route for the construction project.
液压等级线在确定建设项目安全路线中至关重要。