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2. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   A duct with less than 0.75 mg/100m 2 is considered to be clean, per the NADCA standard. [7] A Hong Kong standard lists surface deposit limits of 1g/m 2 for supply and return ducts and 6g/m 2 for exhaust ducts, or a maximum deposit thickness of 60 μm in supply and return ducts, and 180 μm for exhaust ducts. [8]

3. List of the United States Army weapons by supply catalog ...

   en.wikipedia.org/wiki/List_of_the_United_States...

   Ordnance crest "WHAT'S IN A NAME" - military education about SNL. This is a historic (index) list of United States Army weapons and materiel, by their Standard Nomenclature List (SNL) group and individual designations — an alpha-numeric nomenclature system used in the United States Army Ordnance Corps Supply Catalogues used from about 1930 to about 1958.

4. Pressurisation ductwork - Wikipedia

   en.wikipedia.org/wiki/Pressurisation_ductwork

   Pressurisation ductwork (sheet metal) externally fireproofed with pressed vermiculite boards, stapled together. Pressurisation ductwork made of Durasteel. Pressurisation ductwork is a passive fire protection system. It is used to supply fresh air to any area of refuge, designated emergency evacuation or egress route.

5. Fire damper - Wikipedia

   en.wikipedia.org/wiki/Fire_damper

   Interior of German mechanical fire damper inside of a galvanised steel duct. Fire dampers (or fire shutters) are passive fire protection products used in heating, ventilation, and air conditioning (HVAC) ducts to prevent and isolate the spread of fire inside the ductwork through fire-resistance rated walls and floors. [1]

6. List of the United States Army munitions by supply catalog ...

   en.wikipedia.org/wiki/List_of_the_United_States...

   A re-closeable metal box with a hinged metal lid sealed with a foam-rubber gasket to keep out moisture and rain and a folding metal handle to aid in carrying it. They were originally designed to only store belted machine gun ammunition, but later became a standard container after the war for all sorts of ammunition packed in cartons and / or ...

7. MSC Industrial Direct - Wikipedia

   en.wikipedia.org/wiki/MSC_Industrial_Direct

   MSC Industrial Direct Co., Inc (MSC), through its subsidiaries, primarily MSC Industrial Supply Co., is one of the largest industrial equipment distributors in the United States, [1] distributing more than 1.5 million metalworking and other industrial products.