名词短语
中文翻译：表面硬化钢轨
同义词：
['surface hardened rail', 'surface hardened steel rail例句：1. The engineers were tasked with designing the new surface hardened rail for the railway project.（工程师们被指派负责为铁路项目设计新的表面硬化钢轨。）']
例句：
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1. The engineers were tasked with designing the new surface hardened rail for the railway project.
工程师们被指派负责为铁路项目设计新的表面硬化钢轨。
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2. This type of rail is commonly used in high-speed trains due to its surface hardening properties.
这种钢轨因其表面硬化特性而常用于高速列车中。
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3. The engineers worked diligently to ensure that the surface hardening rail was installed correctly and efficiently.
工程师们努力确保表面硬化钢轨安装正确且高效。