Carol Stream, IL Other Information. 1  Located in DUPAGE County, Illinois. 2  Carol Stream, IL is also known as: 3  CHASE BANK, IL.  CITICORP, 1  IL. HOUSEHOLD FINANCE CORP, 2  IL. HOUSEHOLD FINANCIAL SERVICES, 3  IL. NORTH SUBURBAN,  IL.
Ordinance vs. ordnance. An ordinance is a municipal or county law. Ordnance is a mass noun referring to military materials such as weapons, ammunition, equipment, and vehicles. Although ordinance and ordnance now share no definitions, they both come from the Middle English ordinaunce, meaning to set in order.
Obturating rings are common in artillery, where the hard steel casing of the shell is too hard to practically deform to provide a tight seal for the propellant gases. An obturating ring or driving band made of a softer material is the typical solution. Mortar bombs also use obturating rings to provide a seal around the projectile. Recoilless rifles and some artillery use rings with a reverse impression of the rifling cut in them for a tighter seal even at very low pressures.