57 55 j造句

• 57 55 J was accepted for use as training weapon in 1950s because of a lack of suitable training guns and no funds to buy new ones.
• 57 55 J was developed to replace the older 57 mm Nordenfelt and Hotchkiss guns which, while still usable, were getting old and only had iron sights for aiming.
• The old 57 mm Nordenfelt and Hotchkiss guns were worn-out, and 76 mm guns were kept in reserve, so 57 55 J, among other old guns, was used as training piece.
• In case of 57 55 J the gun, stripped of mounting and most other equipment, was attached into a barrel of a heavy gun . 57 55 J was located outside the actual gun and fired normal ammo; thus this does not refer to modern sabot ammunition or inner tube mounts.
• In case of 57 55 J the gun, stripped of mounting and most other equipment, was attached into a barrel of a heavy gun . 57 55 J was located outside the actual gun and fired normal ammo; thus this does not refer to modern sabot ammunition or inner tube mounts.
• The desire of the Finnish Navy headquarters operational section to begin domestic manufacturing of coastal and naval guns also influenced the decision to develop 57 55 J . The prototype, partially based on the older Nordenfelt and Hotchkiss guns, was designed by Engineering Lieutenant Colonel Antero Albert Jokinen and was finished in 1941 in the Helsinki naval base.