May, Ig1t 212 worked out the difficult problems which are presented in drive in this drill simplifies the construction, so that while the case of sand pumps. Their engines are sold singly or there is ample power to drive a 1-inch drill and feed it to its … lips being their Imperial manganese steel. Dredger parts made of manganese steel wear longer than when made of the best quality of ordinary hard steel, thus reducing the up-keep coupled with their pumps for the above uses or for ship use. cost enormously. They make these pumps from 4-inch suction…
Shipbuilding -- Periodicals · Shipbuilding industry -- Periodicals
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
