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用“smokeless powder”造句大全，smokeless powder造句

用“smokeless powder”造句大全，smokeless powder造句

2020-04-29
Acellulosenitrateusedasacomponentofsmokelesspowder.nitrocellulosecontainingarelativelylargeamountofnitrogen;highlyexplosive;usedinmakingsmokelesspowder.Itbecameobsoleteinthe1880swhentheinventionofsmok...