It means that the size of the electrical box is needed so that the shipyard can arrange the location of the electrical box, and the electrician can make the base of the electrical box and weld the corresponding cable bracket
It means that the size of the electrical box is required for the shipyard to arrange the position of the electrical box, and the electrician to make the base of the electrical box and weld it to the corresponding cable tray
It means that the size of the electric box is needed so that the shipyard can arrange the position of the electric box, and the electrician can make the electric box base and weld it with the corresponding cable bracket.