| 1. | Sound signalling devices for household and similar purposes
家用和类似用途的声音信号装置 |
| 2. | Standard specification for bell , cast , sound signalling
铸制声音信号铃 |
| 3. | Determination of range of audibility of sound signal
信号听距测定 |
| 4. | Heart sound signal gathering and analyzing
心音信号采集与分析系统 |
| 5. | Specification for bell , cast , sound signaling
铸制声音信号铃规范 |
| 6. | Sound signalling devices ; acoustic horn bugles for low voltages
音响信号装置.低压嗽叭形音响号角 |
| 7. | Acoustics - sound signal for emergency evacuation
紧急撤离声信号 |
| 8. | Spectrum analysis of heart sound signal based on hilbert - huang transform
心音信号小波变换分析研究 |
| 9. | Standard specification for gong , sound signaling
声音信号钟 |
| 10. | Specification for gong , sound signaling
声音信号钟规范 |
