زند روزن، روزن/سوراخ آتش کردن در انتهای لوله توپ، مشابه محلی که زند/چخماق به چاشنی می خورد و توپ شلیک می کند
Introduction
A touch hole (also called a muzzle) is a small hole in the rear (breech) portion of the barrel of a muzzle-loading gun or cannon. This hole is created by using either a slow match (matchlock), linstock, or a flash pan ignited by some type of pyrite (wheellock) to create an igniting spark in the breech chamber of the barrel (where the propellant burns). where it happens) to be accessible externally. ) or flint-based gunlocks (snaplock, snapfounce, flintlock). This will start the combustion of the main powder. Without a touchhole, igniting gunpowder is nearly impossible. Because otherwise the only access to the muzzle is from the front through the muzzle which is occluded by the projectile. In late caplock firearms, the ignition spark is produced by a shock-sensitive percussion cap resting on a conical "nipple". The nipple has a hollow conduit known as the flush channel that leads into the barrel and serves the same function as the touch. hole. In modern breech-loading firearms, the propellant is packaged inside the case, with a modified detonator (detonator) mounted in a cavity at the rear end of the case. Between the primer pocket and the case chamber are one or more openings, known as flush holes, which act as touch holes inside the cartridge. In cannons, the igniter charge, fuse, fuse, or friction igniter is inserted into the touch hole to ensure that the charge is ignited. Ignition may be by blow or electricity.
https://www.feuerwaffen.ch/index_htm_files/Use_05_Cannon_X.pdf
A diagram of the cannon, including the location of the touch hole
