Definition of secede - withdraw formally from membership of a federal union, an alliance, or a political or religious organization Definition of secede - withdraw formally from membership of a federal union, an alliance, or a political or religious organization
A shell casing is a piece of ammunition that is made of metal. It is often brass, but it can be made of other metals as well, and the more durable the better. Shell casings can be made from any kind of ammunition that is fired from a pistol, rifle or shotgun. It is not a bullet, but it is a piece of the larger ammunition mechanism that is loaded into the chamber to be shot.
Casing Material Water well casing may be constructed of steel or plastic (of various types). Permanent steel casing is not advised as it may corrode in certain groundwaters and also encourage the development of biofilm slimes. The driller should certify that the casing is suitable for the specific borehole. Factors that affect casing selection