The book The Shipbuilding Industry was written by author Roy Willmarth Kelly Here you can read free online of The Shipbuilding Industry book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Shipbuilding Industry a good or bad book?
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The larger drums are fas- tened together with long pieces of steel riveted over the seams called "butt-straps." These are planed and i6i THE SHIPBUILDING INDUSTRY pressed to the right curvature to fit the outside of the drum. On the smaller drums the holes to admit the tubes are drilled on a large drill press capable of boring several holes at once. In constructing the large Scotch boilers, the plates are machined, rolled into shape, the ends fllanged, and a few holes bored through both the pla...tes and the butt-straps to hold the sides and ends together. The boiler is then put on a shell drill for the remaining holes to be bored. This machine consists of a heavy plat- form on which the boiler stands, and two separate drills mounted on tracks so that they can revolve about the boiler. The operator's cage and the machinery operating the horizontal drill are mounted in such a way that an electric motor can shift them up or down. Another motor shifts the position of the drill on the track.
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