line switching

• [信](传输)线(路)开关

line switching的用法和样例：

例句

1. NOTE 1 The different positions of controls and switching devices are taken into account.
   把控制器和开关在置于不同位置的因素考虑在内。
2. The switching reliability and long service life are guaranteed by either a silver plated or optional gold plated contact.
   镀银的或镀金的接点保证了开关的可靠性和使用寿命。