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The T-12 was designed by the construction bureau of the Yurga Machine-Building Plant as a replacement for the BS-3 100 mm gun. The first serial examples were produced in 1955, [2] but the T-12 entered service only in 1961. Its special feature was the use of a smoothbore gun.
A smooth-bore, cast-iron ship's cannon, from the Grand Turk, a replica of a mid-18th century three-masted frigate Replica of "Twin Sisters" smoothbores used in the Battle of San Jacinto (1836) USS Monitor (1862) with the muzzle of one of its two 11-inch smoothbore Dahlgren guns showing
The D-10 is a high-velocity gun of 100 mm calibre (bore diameter), with a barrel length of 53.5 calibres. A muzzle velocity of 895 m/s gave it good anti-tank performance by late-war standards. A muzzle velocity of 895 m/s gave it good anti-tank performance by late-war standards.
Entered service in 1970. Uses the 3V-21 detonator (mass = 0.431 kg, reliability = 0.98). The projectile creates between 600 and 2,000 fragments. The body is made up of 45Kh1 steel or 60S2 high-fragmentation steel for modern projectiles. Modern projectiles creates up to 2,500 effective fragments. Country of origin: Soviet Union; Round weight: 33 ...
A part's-eye view of a boring bar. Hole types: Blind hole (left), through hole (middle), interrupted hole (right). In machining, boring is the process of enlarging a hole that has already been drilled (or cast) by means of a single-point cutting tool (or of a boring head containing several such tools), such as in boring a gun barrel or an engine cylinder.
The nearby Bersham School was reopened as an extensive museum dedicated to local history and Bersham Ironworks, and holds the remaining smooth bore cutting piece from the machine. The Mill building was restored and opened as a secondary museum, and contains artefacts such as the wooden waggonway and several pieces from the excavations, with a ...
Directional boring machine. Directional boring, also referred to as horizontal directional drilling (HDD), is a minimal impact trenchless method of installing underground utilities such as pipe, conduit, or cables in a relatively shallow arc or radius along a prescribed underground path using a surface-launched drilling rig.
The boxhole borer (or machine roger) is a variant of a raise borer that is used when there is not enough space on the higher of the two levels to be connected. The boxhole borer is set up on the lower level, drills a pilot hole as a guide, then drives the reamer bit along the pilot hole from the lower level to the upper.