domingo, 28 de julio de 2013

The compact, lightweight hose that will never kink

A hose is a hollow tube designed to carry fluids from one location to another. Hoses are also sometimes called pipes (the word pipe usually refers to a rigid tube, whereas a hose is usually a flexible one), or more generally tubing. The shape of a hose is usually cylindrical (having a circular cross section). Hose design is based on a combination of application and performance. Common factors are Size, Pressure Rating, Weight, Length, Straight hose or Coilhose and Chemical Compatibility. Hoses are made from one or a combination of many different materials. Applications mostly use nylon, polyurethane, polyethylene, PVC, or synthetic or natural rubbers, based on the environment and pressure rating needed. In recent years, hoses can also be manufactured from special grades of polyethylene (LDPE and especially LLDPE). Other hose materials include PTFE (Teflon), stainless steel and other metals. snippets of time that don't fit nicely into a cycle of 24-hour days. If this time isn't somehow accounted for, the calendar "drifts" relative to the seasons, and the next thing you know, Christmas Day is coming after the spring thaw.The Gregorian calendar deals with this by adding an extra day (Leap Day) to February about every four years, correcting for the seasonal drift. "It's really incredible that in the Middle Ages, they were able to invent a new calendar that was so accurate," Henry told LiveScience. What bothers him about the Gregorian calendar, though, is the frustrating tendency for days of the week to jump around. Because 365 is not a multiple of seven, 7-day weeks don't fit evenly into the Gregorian calendar. That means that each year, dates shift over one day of the week (two during leap years)."Everybody has to redo their calendars," Henry said. "For sports schedules, for schools, for every damn thing. It's completely unnecessary."Under the Hanke
regime. Perhaps the Supreme Leader has no clothes.




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