facture of steel tubing perforated with a number of countersunk holes to tween the upper and lower rolls, the upper roll being through the blast furnace plant, where the iron ore is enable them to bite the skelp and insure its being gradually depressed until the plate is curved to shape smelted and… … department, where they are put through various by decarburization with the air blast and rolled into flanging, crushing and bending tests, as will be ex- forming up the pipe is adopted only for sizes from 8 long strips of various widths and thicknesses which are inches up : the skelp for smaller…
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