A countertenor is a type of classical male singing voice whose vocal range is equivalent to that of the female contralto or mezzo-soprano voice types.
Types of Compound Bows. Compound bows are classified by the type of cam system they use (called the bow eccentric.) The most popular types of compound bows on the market are Single Cam (sometimes also called One Cam or Solocam), Hybrid Cam, Dual Cam and Binary Cam. Less common designs like Quad Cam and Hinged are a little harder to find.
The lesson you will be shown today is on  how to draw a compound bow , step by step. I chose to do this tutorial because my brother has a crossbow but he really wants a compound bow. These types of bows are more of an upgraded version of bow from the standard long, and recurve bows.