Until recently, most users hooked into the net through a directhigh-speed connection on a mainframe or UNIX-based system.
到目前为止，绝大多数的用户都是通过主机或基于UNIX系统的直接高速连接器来上网。
2
From the concept of directhigh-high type frequency control system, introduce the importance of high-voltage in this particular speed control system.
从直接高-高型变频调速系统的概念，引入高压变频器在这种特殊调速系统中的重要性。
3
The structure and principle of a new type of directhigh pressure electric-pneumatic proportional reducing pressure valve with electric feedback is proposed.