in the vertical mill the spindle axis is vertically oriented. milling cutters are held in the spindle and rotate on its axis. the spindle can generally be extended or the table can be raised/lowered, giving the same effect , allowing plunge cuts and drilling. there are two subcategories of vertical mills: the bed mill and the turret mill.
hydraulic fracturing also called fracking, fracing, hydrofracking, fraccing, frac'ing, and hydrofracturing is a well stimulation technique in which rock is fractured by a pressurized liquid. the process involves the high-pressure injection of 'fracking fluid' primarily water, containing sand or other proppants suspended with the aid of .
serradigitus miscionei is a small reddish, brown scorpion, adult females reach an average length of only 25 millimetres 1 in . it was discovered while searching for lizards on the walls of a wash that empties into the san pedro river. it was described on the first of february 2011 by richard ayrey.
the coefficient of lateral earth pressure. the coefficient of lateral earth pressure, k, is defined as the ratio of the horizontal effective stress, σ’ h, to the vertical effective stress, σ’ v. the effective stress is the intergranular stress calculated by subtracting the pore pressure from the total stress as described in soil mechanics.
in a vertical casting machine, the strand stays vertical as it passes through the spray-chamber. molds in a curved apron casting machine can be strht or curved, depending on the basic design of the machine.
sandpainting is the art of pouring coloured sands, and powdered pigments from minerals or crystals, or pigments from other natural or synthetic sources onto a surface to make a fixed, or unfixed sand painting. unfixed sand paintings have a long established cultural history in numerous social groupings around the globe, and are often temporary, ritual paintings prepared for religious or healing .
tower mills, often called vertical mills, stirred mills or regrind mills, are a more efficient means of grinding material at smaller particle sizes, and can be used after ball mills in a grinding process.
the pure 'rolling resistance' for a train is that which happens due to deformation and possible minor sliding at the wheel-road contact. for a rubber tire, an analogous energy loss happens over the entire tire, but it is still called 'rolling resistance'. in the broad sense, 'rolling resistance' includes wheel bearing resistance, energy loss by .
coastal management is defence against flooding and erosion, and techniques that stop erosion to claim lands.. coastal zones occupy less than 15% of the earth's land area, while they host more than 45% of the world population. nearly 1.4 billion people live within 100 km of a shoreline and 100 m of sea level, with an average density 3 times higher than the global average for population.