• zhengqian16 a făcut o actualizare Acum 2 săptămâni, 4 zile

    The Benefits and Application of Steel Pipes

    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 more convenient lengths,…[Citește mai mult]

  • zhengqian16 a făcut o actualizare Acum 2 săptămâni, 4 zile

    A review of rapid prototyping integrated investment casting processes

    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 present paper reviews various…[Citește mai mult]

  • zhengqian16 a făcut o actualizare Acum 2 săptămâni, 4 zile

    Principles and techniques of blood pressure measurement

    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 been phased out in US hos…[Citește mai mult]

  • zhengqian16 a făcut o actualizare Acum 2 săptămâni, 4 zile

    A study on the flow characteristics of butterfly valve with baffles

    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 to other types of valves.…[Citește mai mult]

  • zhengqian16 a făcut o actualizare Acum 2 săptămâni, 4 zile

    What are the different types of nuts and bolts?

    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 materials being fastened, creat…[Citește mai mult]

  • zhengqian16 a făcut o actualizare Acum 2 săptămâni, 4 zile

    Bags of style: how the backpack became a fashion essential

    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 everywhere.

    Fashion searches for…[Citește mai mult]

  • zhengqian16 a făcut o actualizare Acum 2 săptămâni, 4 zile

    The Effect of a Wrist Brace on Injury Patterns

    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 fast-loading gravity-driven…[Citește mai mult]

  • zhengqian16 a făcut o actualizare Acum 2 săptămâni, 4 zile

    Acrylic Nails: Everything You’ve Ever Wanted to Know

    Acrylic nails are the definition of glamour in the beauty world, and pretty much anyone with eyes can see that. But are fake nails safe? Do acrylic nails hurt? How much do acrylic nails cost? And what are acrylic nails even made of, anyway? If you’re curious about acrylics and have never tri…[Citește mai mult]

  • zhengqian16 a făcut o actualizare Acum 2 săptămâni, 4 zile

    Water Well Maintenance and Rehabilitation

    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 important and this paper is an…[Citește mai mult]

  • zhengqian16 a făcut o actualizare Acum 2 săptămâni, 4 zile

    Introduction of the components of the film blowing machine

    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 blank, which flows in a better melt flow. In the state, the…[Citește mai mult]

  • zhengqian16 a devenit un membru înregistrat Acum 2 săptămâni, 4 zile