The principal metalworking tool that is mounted on weld tube mills and roll formers. Rolls contact the metal strip as it enters the process. They provide both the friction to pull the strip through the mill, and the necessary contours to change the shape of the strip into the desired finished piece.
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Stop to notice the technology - by Dan Davis Keeping your nose to the grindstone could prevent you from noticing the rapid changes occurring in the world around you.
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