Coiled sheet metal strip opens into tubular configuration

Copper alloy is converted into a spring material that can be rolled into a compact coil which will spontaneously open to form a tube in the long direction of the strip. The copper alloy is passed through a furnace at a prescribed temperature while restraining the strip in the desired tubular configuration

Method of making tubes Patent

Forming tubes from long thin flat metal strip

The Soybean

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The Soybean: Its Place in a Farming System

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Farming with Soybeans For Marketing For Feeding For Land Use

PDF pages: 1