telephone for special use的意思|示意

An intrinsically safe signal telephone system special for mine use is dealt with in this paper including its development, construction, design features and application results.

介绍了一种专为煤矿井下使用的本安型信号电话系统的研究和它的构成、设计特点及使用效果。

How to realize and use telephone reflects university students' media literacy. It also calls for the special attention from the administrative personnel.

如何认识和使用手机媒体是大学生媒介素养的具体体现，也是高校教育管理工作者应重点关注的新课题。