Alexandr Alexeevich Lavrentiev

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Moscow, SU

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Patents Grantslast 30 patents

Information Patent Grant
Tubular coiled heat exchanger and device for manufacturing same
- Patent number 4,116,270
- Issue date Sep 26, 1978
- Ruf Fedorovich Marushkin
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...