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来源:雅诚德英语网
Some events of fire faillure of spacecraft which have been taken place in America, as examples, were presented.
介绍了载人航天中防火安全问题的处理原则。
Some events of fire faillure of spacecraft which have been taken place in America, as examples, were presented.
介绍了载人航天中防火安全问题的处理原则。