Vatikus Posted October 1, 2017 Posted October 1, 2017 (edited) patent: https://www.google.com/patents/US3699310 MIL spec: http://mil-spec.tpub.com/MIL-A/MIL-A-85055/ http://mil-spec.tpub.com/MIL-D/MIL-D-85056A/ Edited October 5, 2017 by Vatikus 1
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