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A jerrycan or jerrican (also styled jerry can or jerri can) [1] is a fuel container made from pressed steel (and more recently, high density polyethylene). It was designed in Germany in the 1930s for military use to hold 20 litres (4.4 imp gal; 5.3 US gal) of fuel, and saw widespread use by both Germany and the Allies during the Second World War .
Bubble wrap is a pliable transparent plastic material used for packing fragile items. Regularly spaced, protruding air-filled hemispheres (bubbles) provide cushioning for fragile items. In 1957, two inventors named Alfred Fielding and Marc Chavannes were attempting to create a three-dimensional plastic wallpaper.
Subcutaneous emphysema has a characteristic crackling-feel to the touch, a sensation that has been described as similar to touching warm Rice Krispies. [ 2 ] This sensation of air under the skin is known as subcutaneous crepitation, a form of crepitus. Numerous etiologies of subcutaneous emphysema have been described.
After a drawing, they retreated to the Red Roof Inn and searched for winning numbers, piling tickets on the double beds and the tables and the air conditioner and the floor. Counting $70,000 in tickets took a full 10 days, working 10 hours a day. They never left the room except to get lunch.
Being submerged in grain, with possibly fatal consequences. U.S. Occupational Safety and Health Administrationillustration of grain entrapment. Grain entrapment, or grain engulfment, occurs when a person becomes submerged in grainand cannot get out without assistance. It most frequently occurs in grain binsand other storage facilities such as ...
Air sac. Air sacs are spaces within an organism where there is the constant presence of air. Among modern animals, birds possess the most air sacs (9–11), with their extinct dinosaurian relatives showing a great increase [clarification needed] in the pneumatization (presence of air) in their bones. [1] Birds use air sacs for respiration as ...
Air entrainment in concrete is the intentional creation of tiny air bubbles in a batch by adding an air entraining agent during mixing. A form of surfactant (a surface-active substance that in the instance reduces the surface tension between water and solids) it allows bubbles of a desired size to form. These are created during concrete mixing ...
A cultipacker is a piece of agricultural equipment that crushes dirt clods, removes air pockets, and presses down small stones, forming a smooth, firm seedbed. Where seed has been broadcast, the roller gently firms the soil around the seeds, ensuring shallow seed placement and good seed-to-soil contact.