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This application discloses an aluminum alloy cylinder head for an internal combustion engine having an integral valve stem guide bore therein with integral wear resistant end portions of the bore formed by an integrally bonded but different metal alloy for forming the wear resistant end portions. Aluminum alloy cylinder head with a valve guide bore […]

Guide for surrounding and sealing a rod in the end of a hydraulic cylinder including a piston slidably disposed in the cylinder and attached to the end of the cylinder piston rod and a method for manufacturing the guide. The guide includes an inner guide bore with dovetail shaped channels extending annularly about the guide […]

Plastic mold has been developing about 40 years. It occupies a very important position in the plastic molding process. Plastic mold plays a very important part in the mold industry. Mold production technology is also a one of the important symbols of a country’s level in manufacturing process. In the international community, in order to […]

When installing lights into a room it is worth carefully considering what lighting solutions will best suit your need. A very popular choice of lighting for the modern day home is the LED downlight. It is often a common choice for home owners to install LED downlights in their kitchens, bathrooms or even bedrooms, to […]

I remember teaching user interface design courses back in the mid-nineties. In those courses there was a slide entitled “rapid prototype,” and on that slide were all the reasons why rapid prototyping was a bad idea. Most of the reasoning centered around prototyping tools being so complex back then, they needed to be operated by […]