new scientific research equipment: trial type triple-mounted 203mm SKC main gun modification (sea Legend), the prototype triple-mounted 406mm main gun Mk6 modified, the prototype triple-mounted 150mm five-type high-level dual-purpose gun, the prototype double-mounted TbtsKC42T type 150mm main gun, the prototype triple-mounted 380mm main gun Mle1935, and the prototype Operational 55mm Gerät 58 anti-aircraft gun;