kerf 截口，切缝，槽kernel 核心kernel boundary 核心边缘kernel mode 核心模式kevlar 凯芙拉（一种合成纤维）key compression 主要压缩key macro 关键指令组key server 密钥服务程序；密钥服务器key telephone system (KTS) 按键电话系统key value 关键值key, alphanumeric 字母数字键key, shift 字母变换键key, shift lock 字母变换锁定键key, soft 软键keyboard 键盘keyboard asynchronous receiver/transmitter (KART) 键盘异步收发机keyboard terminal 键盘式终端机keying, amplitude shift (ASK) 振幅变换键控keying, binary frequency shift (BFSK) 二进制频率变换键控keying, binary phase shift (BPSK) 二进制相位变换键控keying, dif