Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 21
draulics, Factor of Safety. When a calculation of the ultimate strengthof a machine is to be made it is necessary to provide forcontingencies—this takes the form of a multiplier, and iscalled the factor of safety, or the margin of safety. Feather, or sunk key. A key that is fast in one piece…
Hydraulic machinery · Pumping machinery
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