class of safety protection的意思|示意
安全防护等级
class of safety protection的网络常见释义
安全防护等级 ... 安全防护等级 class of safety protection 安全防护装置— Safety devices 辐射安全防护 radiologicalsafetyprotection ...
class of safety protection相关短语
1、 class s of safety protection 安全防护等级
class of safety protection相关例句
Making use of swimming teaching experience and measures that are proposed in reference, the author makes a preliminary research on the safety protection in swimming class.
利用多年游泳教学经验及文献给出的方法，对高校开设游泳课教学中安全防护作了初步探讨。