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A trapdoor or hatch is a sliding or hinged door that is flush with the surface of a floor, ceiling, or roof. [1] It is traditionally small in size. [ 2 ] It was invented to facilitate the hoisting of grain up through mills, however, its list of uses has grown over time. [ 3 ]
Glass doors pose the risk of unintentional collision if a person is unaware there is a door, or thinks it is open when it is not. This risk is greater with sliding glass doors because they often have large single panes that are hard to see. Stickers or other types of warnings on the glass surface make it more visible and help prevent injury. In ...
A coal hole is a hatch in the pavement (sidewalk, in US usage) above an underground coal bunker. [ 1 ] [ 2 ] They are sometimes found outside houses that existed during the period when coal was widely used for domestic heating from the early 19th century to the middle 20th century.
Until the 16th century, window glass or other flat glass was generally cut from large discs (or rondels) of crown glass. Larger sheets of glass were made by blowing large cylinders which were cut open and flattened, then cut into panes. Most window glass in the early 19th century was made using the cylinder method. The 'cylinders' were 6 to 8 ...
Hatch, a sealed or secure door of a ship, submarine, aircraft, spacecraft, or automobile Hatch, a sluice gate Hatch, a trapdoor , a door on a floor or ceiling
Broadly, modern glass container factories are three-part operations: the "batch house", the "hot end", and the "cold end". The batch house handles the raw materials; the hot end handles the manufacture proper—the forehearth, forming machines, and annealing ovens; and the cold end handles the product-inspection and packaging equipment.
In Australia, manhole also commonly refers to an access hatch used to get access from a room or hallway into the ceiling cavity of a building. [3] [4] These manholes are typically around 450 mm × 450 mm (18 in × 18 in) square.
Moser a.s. is a luxury glass manufacturer based in Karlovy Vary, Czech Republic (previously Ludwig Moser & Sons in Bohemia, Austria-Hungary).The company is known for manufacturing stemware, decorative glassware (such as vases, ashtray, candlestick), glass gifts and various art engravings.
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