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<p>ideas, methods, and design features which they employ.</p>

<p><big>Camshaft</big></p>
<p>A <a href="page.php?w=camshaft">camshaft</a>, a shaft to which <a href="page.php?w=Cam_%28mechanism%29">cam</a>s are attached, was described in 1206 by al-Jazari, who employed them in his <a href="page.php?w=automaton">automata</a>, <a href="page.php?w=water_clock">water clock</a>s (such as the <a href="page.php?w=candle_clock">candle clock</a>) and water-raising machines.</p>

<p><big>Crankshaft and crank-slider mechanism</big></p>
<p>The eccentrically mounted handle of</p><p>
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