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A gimlet is a hand tool for drilling small holes, mainly in wood, without splitting. It was defined in Joseph Gwilt's Architecture (1859) as "a piece of steel of a semi-cylindrical form, hollow on one side, having a cross handle at one end and a worm or screw at the other". [1] A gimlet is always a small tool.
Wood slabs can also become warped as a result of insufficient support from underlying shelf hardware (commonly referred to as sagging or bowing). [2] The types of wood warping include: bow: a warp along the length of the face of the wood; crook: a warp along the length of the edge of the wood; kink: a localized crook, often due to a knot
Lift slab construction (also called the Youtz-Slick Method) is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising (jacking) the slab up with hydraulic jacks. This method of construction allows for a large portion of the work to be completed at ground level, negating the ...
Side and end view of a 4-fluted countersink. The fluted countersink cutter is used to provide a heavy chamfer in the entrance to a drilled hole. This may be required to allow the correct seating for a countersunk-head screw or to provide the lead in for a second machining operation such as tapping.
The Red Lake sinkhole in Croatia. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water enters into underground passages known as ponor, swallow hole or swallet.
The structure becomes a ubiquitous, multipurpose tool for humans to exploit. Cupstone sites in Northern Italy, Switzerland and the Atlantic regions, also known as "druid altars" or "Opferkessel" ( sacrificial bowl ), are associated with places of worship due their locality close to glacial erratics , view points and treacherous alpine trails.
Cupping causes breaks in the capillaries (small blood vessels) in the papillary dermis layer of the skin, resulting in the appearance of petechiae and purpura. [1] These marks are sometimes mistaken for signs of child abuse when cupping is performed on children. [1] Cupping therapy adverse events can be divided into local and systemic adverse ...
The sinkhole is approximately 8 metres (26 ft) by 10 metres (33 ft) in size. The pre-excavation soil surface in the sinkhole was about 7 feet (2.1 m) below the ground surrounding the sinkhole. Cores indicate that the fossil layer in the sinkhole is at least 4 metres (13 ft) deep, extending well below the water table.