Axial axis Vent

In of the bore.ordnance, the vent when it is in line with the. — A straight line, real or imaginary, about which a body revolves, is called the axis of rotation. In gunnery, the axis of the piece is the central line of the bore of the gun. of Bore. central line of the bore of a gun. Also called axis —of The cannon. of the Barrel. — An imaginary line following the center of the bore from the breech to muzzle. of Trunnions. — The central line of the trunnions of a piece. … One of the high explosives of secret composition, which increases the muzzle velocity some 400 feet per second and accordingly lowers the trajectory. — A lathe used in the arsenal and foundry. — A solid bar or beam, so shaped as to receive at each of its extremities a wheel, which revolves freely about it. Those parts about which the wheels revolve are called the or axle-tree arms.