?单断口触头组

... single bounce technique 二次波法 single-break contact assembly 单断口触头组 single break switch 单断路开关，单断口开关 ...

[电]?单断点触头组

... single-acting positioner 单作用定位器 single-break contact assembly 单断点触头组 single-break contact 单断点触头 ...