DSO "Montagi"

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Sophia, BG

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Apparatus for transforming the cross-section of a thin-walled cylinder
- Patent number 4,008,596
- Issue date Feb 22, 1977
- DSO "Montagi"
- Radoslav Stanev Petrov
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

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