名词
中文翻译：领先型架
同义词：
['leading frame', 'leading beam']
例句：
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1.The new design of the car has a leading sheave that makes it more efficient.
这款汽车的新设计有一个领先的框架，使其更加高效。
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2. The construction worker used a leading sheave to lift the heavy beams.
建筑工人使用一个领先的框架来抬起沉重的梁。
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3.The engineer designed a leading sheave to improve the stability of the bridge.
工程师设计了一个领先的框架来提高桥梁的稳定性。