名词
中文翻译：煤炭保护结构
同义词：
['coal-sealing structure', 'coal-protecting structure']
例句：
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1. Themine uses a coal-preserving structure to prevent dust from spreading.
该矿使用一种煤炭保护结构来防止粉尘扩散。
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2.The company has invested heavily in developing new coal-preserving structures.
该公司在开发新的煤炭保护结构方面投入了大量资金。
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3.The coal-preserving structure is designed to protect the miners' safety during mining operations.
这种煤炭保护结构旨在在采矿作业期间保护矿工的安全。