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<dl><dd>"September 1923"--T.p</dd>
<dd>"This publication supersedes Ordnance Pamphlet Nos. 20, Service explosives ; 368, Part II, Marking of ammunition ; 21, Pyrotechnic signal material, and all previous instructions regarding tests of service explosives" -- p. iii</dd>
<dd>Changes inserted</dd>
<dd>General instructions -- Safety precautions -- Definitions and history of explosives -- Black powder -- Smokeless powder -- Tests of smokeless powder -- Surveillance ovens -- High explosives -- Detonating substances -- Projectiles -- Cartridge cases and tanks -- Fuses and tracers -- Primers -- Assembled charges -- Miscellaneous ammunition -- Aircraft ammunition -- Storage of ammunition -- Marking of ammunition -- Pyrotechnics -- Interior ballistics -- Erosion -- Dispersion -- Reports</dd></dl><br>Subjects: United States. Navy; Ammunition; Ordnance, Naval</div>
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United States. Navy Dept. Bureau of Ordnance</div>
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