名词
中文翻译：未保护的混凝土垫层同义词
同义词：
['unprotected concrete base', 'unprotected concrete slab', 'unprotected concrete formwork']
例句：
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1. The builders laid down the unprotected concrete pad before starting the construction.
建筑工人在开始施工之前铺设了未保护的混凝土垫层。
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2. The engineer used this unprotected concrete pad to support the weight of the heavy equipment.
工程师使用这个未保护的混凝土垫层来支撑重型设备的重压。
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3. The workers had to remove the unprotected concrete pad to make way for the new road.
工人们不得不拆除未保护的混凝土垫层，以便修建新的道路。