a screw thread, the section of which is between the square and V threads. Used extensively for feed screws. The included angle of space is 29° as compared to 60° of the National Coarse or U.S. Thread.
1. a concussion, or sound of concussion, of moving water against the sides of a containing pipe or vessel on a sudden stoppage of flow. 2. a pressure that results from a sudden deceleration of flow of water in a closed pipe. 3. the term used to identify the hammering noises and severe shocks that […]
a story whose floor line is below grade at any entrance or exit and whose ceiling is not more than five feet above grade at any such entrance or exit, or whose floor is three or more feet below normal terrain.
iron treated by the Bell-Krupp process so as to remove most of the silicon and phosphorus and not too much of the carbon.
the removal from water of those dissolved mineral constituents which cause it to be unsatisfactory for domestic or industrial use.
1. pressure below atmospheric. 2. a space absolutely devoid of matter; it is usually measured by the number of inches of mercury below atmospheric pressure, such as ten or twenty inches of mercury
a process of making steel from cast iron by burning out carbon and other impurities through the agency of a blast of air which is forced through the molten metal. The process is either acid or basic according to the nature of the refractory lining of the converter, or vessel in which the blowing is […]