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There was no duct tape in the 1940's
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Originally it WAS called duck tape, because of its waterproof 'abilities' but the name was forgotten and changed to duct tape because it was originally silver like the ducts that it repaired.
Duct tape was originally called Duck tape. It was green in color and used in the Military first. Generally used to tape Ammo cans shut. After WWII the tape was colored silver and used on Air Ducts during the housing boom when the troops came home. Duct tape can be used in emergency situations to repair almost anything, it can help house windows withstand hurricane winds, hold car bumper covers on and restrain prisoner's hands and feet in the event hand cuffs are unavailable.
"Duct tape was originally developed during World War II in 1942 as a water resistant sealing tape for ammunition cases. Permacel, then a division of Johnson & Johnson, used a rubber-based adhesive to help the tape resist water and a fabric backing to add strength. It was also used to repair military equipment quickly, including jeeps, firearms, and aircraft because of these properties."
To calculate duct area, multiply the width of the duct by the height of the duct. This gives you the area in inches or centimeters, depending on the unit of measure used for the calculation.
No Purple and Black CheckeredAccording to the Duck Tape website, there is not purple and black checkered duct tape.
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It seems that Duct phones by Panasonic can only be purchased by an authorized dealer. The only locations per the Panasonic website that allow you to purchase the duct phones are: Proudy Precision and Re Michael Co Inc
cystic duct and the hepatic duct
The bile duct.
Hepatic duct is attached with liver. The union of hepatic duct and cystic duct forms common bile duct.
common bile ductThe common bile duct.
The Cystic duct from the gallbladder and the Common Hepatic duct from the liver
In animals, the nasolacrimal duct is a tear duct. This duct carries tears from the lacrimal sac to the nasal cavity.
common bile duct
Common Hepatic Duct.