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.
The vibraphone (also known as the vibraharp or simply the vibes) is a musical instrument in the struck idiophone subfamily of the percussion family. The vibraphone resembles the xylophone, marimba, and glockenspiel. Each bar is paired with a resonator tube that has a motor-driven butterfly valve at its upper end.