support column consisting of a steel cylinder filled with concrete
2
especially, the process, invented by Perkins, of multiplying facsimiles of an engraved steel plate by first rolling over it, when hardened, a soft steel cylinder, and then rolling the cylinder, when hardened, over a soft steel plate, which thus becomes a facsimile of the original
3
A steel cylinder round which metal is drawn in the process of forming tubes. n
