实用和适用不是一字之差刘雁飞专利发明的实用和适用，看似只有一字之差，其实其中大有讲究。查汉语字典，实即真，不虚假之意，专利三性中的实用性就是指能制造出实物或者投入使用，并能产隆积极效果。“适”则有合宜、恰好之意。“适用”即能使人便当地、得心应手地使用... Practical and applicable is not a word of difference Liu Yanfei practical and applicable patented invention, seemingly only one word difference, in fact, a lot of stress. Check the Chinese dictionary, that is, real, not false meaning, pragmatic utility refers to the three can create physical or put into use, and can produce positive results. “Fitness” there is appropriate, just the meaning. “Suitable” means that you can use it conveniently and conveniently.