Parallel Key Calculator Added

Added a calculator....
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More calculator updates...

Guess what? I’ve added some new calculators and updated others....
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Calculator Updates

I’ve added some calculators and improved how the diagrams work....
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Update, and calculators

Small update and an announcement about a new set of web-based theatre calculators I’ve started working on....
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Frustum Calculator

An update to a frustum calculator....
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Fluid Power Calculator

A release of a web-based fluid power calculator....
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