JIS C8471-2-1-2022
Cable trunking systems and cable ducting systems for electrical installations -- Part 2-1: Particular requirements -- Cable trunking systems and cable ducting systems intended for mounting on walls and ceilings
Cable trunking systems and cable ducting systems for electrical installations -- Part 2-1: Particular requirements -- Cable trunking systems and cable ducting systems intended for mounting on walls and ceilings