Aviation & Aerospace - , ,
Keystone Engineering Company is engaged in the business of designing, manufacturing, and selling engineered products used in critical flight-weight aerospace and defense applications. Keystone's products include light-weight propellant and pressure storage tanks, spun products for satellites and launch vehicles, Airborne Warning and Control System aircraft bearings and other specialized engineered products for various defense and aerospace applications. Keystone operates in two locations, a facility in Ontario, California, owned by Keystone and a leased facility in Long Beach, California.
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