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There is a new kind of PDA that is “GPS enabled” which not only keeps your schedule of appointments, but also tells you how to get to each and how long it will take.  Some newer models can even factor in the amount of real time traffic in telling you exactly when you need to leave.  If traffic hits unexpectedly, they can give you alternate routes where there is less traffic.

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Casting
molds are an essential part of the metal casting process as it will be used to
shape the final result. Nearly all metal casting methods will use some type of
mold. The standard mold will consist of a cope and drag that when together is
called a flask. The mold itself can be constructed of several materials
depending upon the casting method.

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