１．适用性。是指在一定条件下，实现预定目的或规定用途的能力。每一种产品都有它特定的用途，这是质量内涵的核心。 以鱼钩为例。为达到刺鱼之目的，钩尖首先要锋利。简单的判定方法，可用钩尖在指甲上划一划，有光滑感的就不好。其次是钩型的力学特性要好，具体请参阅王佩珩 1. applicability. Refers to under certain conditions, to achieve the intended purpose or the ability to use. Each product has its own specific use, which is the core of quality. Take a fishhook as an example. In order to achieve the purpose of the bream, the hook tip must be sharp first. Simple decision method, you can use the tip of the hook in the nails on a plan, a sense of smooth is not good. Followed by hook type mechanical properties better, see Wang Peiheng specific