| 发明名称 |
ULTRASONIC TRANSDUCER FOR MEASURING AIR FLOW, IN PARTICULAR FOR MEASURING THE AIR MASS IN INTERNAL COMBUSTION ENGINES |
| 摘要 |
The ultrasonic transducer (1) has a front face (4) which oscillates in congruent phase and a rotationally non-symmetrical beam. |
| 申请公布号 |
WO9108843(A3) |
申请公布日期 |
1991.07.25 |
| 申请号 |
WO1990DE00973 |
申请日期 |
1990.12.18 |
| 申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
VON JENA, ALEXANDER |
| 分类号 |
G01F1/66;G10K11/30 |
主分类号 |
G01F1/66 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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