2) The altitude above mean sea level. This is important for long range precision shooting because the air density changes with elevation and affects the path of the bullet. Extractor* A device that withdraws or elevates a fired shell casing or a live round from the chamber as the breech mechanism is opened.
The rebec was adopted as a key instrument in Arab classical music and in Morocco a tradition of Arabo-Andalusian music has been kept alive by descendants of Muslims who left Spain as refugees following the Reconquista.he instrument was used by dance masters until the 18th century, however, often being used for the same purpose as the kit, a small pocket-sized violin. The rebec also remained in use in folk music, especially in eastern Europe and Spain. Andalusi nubah, a genre of music from North Africa, often includes the rebec.
Members of the Brigadiers Drum & Bugle Corps (NY) hornline in 2007, with contrabass horns (contras). The contrabass bugle (usually shortened to contra or simply called the marching tuba) is the lowest-pitched instrument in the drum and bugle corps and marching band hornline. It is essentially the drum corps' counterpart to the marching band's sousaphone: the lowest-pitched member of the hornline, and a replacement for the concert tuba on the marching field. It is different from the other members of the marching band and drum corps hornlines in that it rests on the shoulder of the player, rather than being held in front of the body.