pulse code modulationpʌlskəudˌmɔdjuˈleiʃən短语²⁹²⁶⁵ 基本例句 脉码调制 A pneumatic hydraulic servo system controlled by PCM Pulse Code Modulation is realized by a new pneumatic hydraulic cylinder and low cost switching valve. 提出了一新型气液缸和用廉价开关阀实现 PCM控制的气液伺服系统。 chemyq