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1. The Military Occupational Skill (MOS) assigned to a Chemical Specialist. Called Seventy-four Delta in military lingo. 2. A glorified car washer in the US Army. 3. Someone with a lot of time on their hands. 4. The most likely person to survive a chemical attack, but the least likely to survive that long. 5. The occupational skill in the Army that requires one to know how to blow up self contained haz-mat suits, fill bottles of air, setup a shower, and scrub down another human being.
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