名词
中文翻译：气体密封性
同义词：
['gas tightness', 'gastightness', 'gastightness']
例句：
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1. The newcar has a very high gas proofness, which is very important for its performance.
这款新车具有非常高的气体密封性，这对于它的性能来说非常重要。
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2.The gas proofness of the tank is tested before each use to ensure safety.
每次使用前都会测试油箱的气体密封性以确保安全。
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3.The engineers carefully checked the gas proofness of the pipeline to prevent any leaks during construction.
工程师们仔细检查了管道的气体密封性，以防止施工过程中的任何泄漏。