Megadyne is a leading worldwide manufacture of polyurethane transmission belts and rubber belts.意大利麦高迪公司是全球著名的聚氨脂皮带和橡胶带生产企业.The microphone converts acoustic waves to electrical singals for transmission.麦克风将声波转化成电信号进行传播。T...
The BBC has just successfully demonstrated a new digital radio transmission system.英国广播公司刚刚成功地演示了一套新的数字无线电传输系统。The transmission began with a recitation from the Koran.节目一开始是一段《古兰经》朗诵。the transmission of the disease这种疾病的传...