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The covers usually feature "pick holes", into which a hook handle tool is inserted to lift them. Pick holes can be concealed for a more watertight lid, or can allow light to shine through. A manhole pick or hook is typically used to lift them, though other tools can be used as well, including electromagnets. Painted manhole cover in Osaka, Japan
A burial vault encloses a coffin on all four sides, the top, and the bottom. Modern burial vaults are lowered into the grave, and the coffin lowered into the vault. A lid is then lowered to cover the coffin and seal the vault. Modern burial vaults may be made of concrete, metal, or plastic.
When the glass and the metal being hermetically sealed have the same coefficient of thermal expansion, a "matched seal" derives its strength from bond between the glass and the metal's oxide. This type of glass-to-metal hermetic seal is generally used for low-intensity applications such as in light bulb bases.
Clean-outs are fittings with removable elements, allowing access to drains without removing plumbing fixtures. They are used to allow an auger (or plumber's snake) to clean out a plugged drain. Since clean-out augers are limited in length, clean-outs should be placed in accessible locations at regular intervals throughout a drainage system ...
The stuffing box prevents water from entering the boat's hull. In many small fiberglass boats, for example, the stuffing box is mounted inboard near the point the shaft exits the hull. The "box" is a cylindrical assembly, typically of bronze, comprising a sleeve threaded on one end to accept adjusting and locking nuts.
It is best known for its early production of glass jars, lids, and related products used for home canning. Since its founding in Buffalo, New York , in 1880, [ 2 ] when it was known as the Wooden Jacket Can Company, the Ball company has expanded and diversified into other business ventures, including aerospace technology.
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