Steel pipes are the most commonly used pipes in water supply systems. They are also used in pipelines for natural gas, and sewerage systems. Although comparatively expensive to other pipes, they hold the advantage of being able to withstand high pressures and are available in…[Leggi tutto]

Investment casting has been used to manufacture weapons, jewellery and investment casting during the ancient civilization. Today, its applications include jewellery/art castings, turbine blades and many more industrial/scientific components. The…[Leggi tutto]

Although the mercury sphygmomanometer is widely regarded as the “gold standard” for office blood pressure measurement, the ban on use of mercury devices continues to diminish their role in office and hospital settings. To date, mercury devices have largely bee…[Leggi tutto]

The butterfly valve was originally used where a tight closure was not absolutely necessary. However, over the years, these valves have been manufactured with fairly tight seals made of rubber or elastomeric materials that provide good shut off similar…[Leggi tutto]

What does a bolt look like? Let’s start with a nuts-and-bolts definition. Bolts are threaded fasteners with external male threads. They mate with nuts, which have female – meaning, internal – threads.

What are nuts used for? Both the bolt and the nut grip the mater…[Leggi tutto]

They used to be carried by the slightly awkward-looking kids in the school playground or hikers and were much more likely to be sported by men than women. But now, go to any high street, office or packed rush-hour bus and the humble backpack bag is…[Leggi tutto]

We compared patterns of bony and ligamentous injury with distal radial fractures in braced and unbraced wrists using 20 paired fresh cadaveric upper extremi ties. A commercially available wrist brace was placed on one wrist in each pair. Specimens were then placed in a…[Leggi tutto]

The purpose of the study to obtained water well screens opening size and gravel packs size, and to access within the groundwater inter through the aquifer to the well screen and prevent running sand from entering the well. The use of properly designed screen and gravels are…[Leggi tutto]

Blow Membrane is a plastic processing method, which refers to a plastic processing technology in which plastic particles are heated and melted and then blown into a film. Usually, the polymer is extruded to form a tubular film…[Leggi tutto]