The plating liquid having reached the upper end circulates through the through-hole of the tubularelectrode.
已经到达上端的电镀液穿过管状电极的通孔循环。
2
A circular tube-like gap (S1) in which a plating liquid (17) flows is formed between the tubularelectrode placed in the hollow section and an inner peripheral wall (14) of the hollow section.