✦ LIBER ✦
Echo-sounding circuit: Atlas-Werke Aktiengesellschaft, British Patent 1, 139, 494 (8 January 1969)
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- English
- Weight
- 163 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0041-624X
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