The most challenging of these are the criteria associated with the National Fire Protection Assn. 's (Quincy, Mass. ) NFPA 285 test method.
其中最有挑战的是美国国家防火协会的285测试方法。
The most challenging of these are the criteria associated with the National Fire Protection Assn. 's (Quincy, Mass. ) NFPA 285 test method.
其中最有挑战的是美国国家防火协会的285测试方法。
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