key instrument

The aim of the dissertation is to implement a safe VPN system which can provide both safe authentication and safe transportation without the help of Public Key Instrument.

本文的目的是在不借助公钥基础设施的情况下，利用动态口令实现安全认证和传输的一个基本的VPN系统。

Meanwhile, in order to run more economically, reliably and safely, it is hot research in online inspection of key instrument of electric power system nowaday.

同时，为了电力系统更经济可靠安全地运行，对电力线路系统关键设备的在线监控也成为该领域的一个研究热点。

Electron beam lithography machine is the key instrument for mask making and research of nanometer device.

电子束曝光技术是掩模版制作和纳米器件研究的主要手段。

Acid-leaching reactor is the key instrument for preparing poly aluminium chloride ( PAC ) from kaoline.

酸浸反应器是高岭土制备聚合 氯化铝 (PAC ) 的重要设备.

The enterprise competition, meanwhile after sales service management has become a key instrument for the enterprise to build up the competitive advantages.

此时，售后服务管理成为塑造企业的竞争优势的重要手段。