A common tungsten carbide reamer construction includes a cylindrical body that consists a set of helical cutting edges along it. Specially,every cutting edge has a slight angle, and below which there ‘s a small undercut. It is recommended that the cutting edges of  reamer should have both hardness and toughness, so that ,during the usage, the tool could work functionally under the normal forces . They should only be used to remove small amounts of material. This ensures a long life for the reamer and a superior finish to the hole.

For production machine tools, the shank type is usually one of the following: a standard taper , a straight round shank to be held by a collet, or a straight round shank with a flat for a set screw, to be held by a solid toolholder. For hand tools, the shank end is usually a square drive, intended for use with the same type of wrench used to turn a tap for the cutting of screw threads.


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A tungsten alloy multi-leaf collimator is a device made up of individual tungsten alloy "leaves", that can move independently in and out of the path of a particle beam in order to block it.

tungsten alloy multi-leaf collimators are used on linear accelerators to provide conformal shaping of radiotherapy treatment beams. Specifically, conformal radiotherapy and Intensity Modulated Radiation Therapy (IMRT) can be delivered using tungsten alloy multi-leaf collimator.

The tungsten alloy multi-leaf collimator has improved rapidly since its inception and the first use of leaves to shape structures in 1965 to modern day operation and use. Tungsten alloy multi-leaf collimator's are now widely used and have become an integral part of any radiotherapy department. Tungsten alloy multi-leaf collimators were primarily used for conformal radiotherapy, and have allowed the cost effective implementation of conformal treatment with significant time saving, and also have been adapted for use for IMRT treatments.

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The tungsten alloy multi-leaf collimator is an important tool for radiation therapy dose delivery. It was originally used as a surrogate for tungsten alloy block field shaping and is now widely used for Intensity Modulated Radiation Therapy. For conformal radiotherapy the tungsten alloy multi-leaf collimator allows conformal shaping of the linear accelerator (LINAC) beam to match the borders of the target tumour. For intensity modulated treatments the tungsten alloy leaves of a multi-leaf collimator can be moved across the field to create Intensity Modulated Radiation Therapy distributions (tungsten alloy multi-leaf collimator's really provide a fluence modulation rather than intensity modulation).

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There are many different tungsten alloy detectors for different radiation, such as ionization chamber, proportional counter, Geiger counter for α, β tungsten alloy detection, but how to select a suitable tungsten alloy detector for different radiation?
The range and energy of the radiation to be detected: you can't bury a alpha tungsten alloy detection element behind in a sealed, rugged case, because the particles will range out before they get there.

The size of the tungsten alloy detector elements: the size of the readout equipment which may be separate and their arrangement relative each other.

The sensitivity and efficiency needs to different kinds of radiation, to different energies that might be present.
Some of this kit can be very expensive, and you might choose a not-quite-the-best choice if you already have it and the necessary readout gear sitting around the lab from a old experiment. This is the equivalent of a bumper sticker.

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