n.光标设备 signal equipment: 信号设备light signal: 灯光信号; 灯号; 炮光信号signal light: 号志灯; 信号灯;指示灯; 讯号灯light equipment: 轻便设备; 轻型装备; 照明设备轻型设备analog signal demodulation equipment: 模拟信号解调设备下载手机词典可随时随地查词查翻译