也为键盘或按钮提供可选的键帽。
Optional key caps might also be provided for keyboards or buttons .
包括键盘、键帽，其键盘上安装有键盘护板。
The keyboard is equipped with a guard board .
尽管键帽是绝缘的，这个准则也应用到键区开关线。
This rule applies to keypad switch lines , too , despite their insulating keycaps .
键帽