An article on HARDLOCK’s products published in “Gijutsu no Mado” (A Window on Technology), the May edition of Kogyo Kyoiku (Industrial Education) produced by the National Association of Principals of Technical Senior High Schools and published by Sangaku Tsushinsha.

An article on HARDLOCK’s products published in “Gijutsu no Mado” (A Window on Technology), the May edition of Kogyo Kyoiku (Industrial Education) produced by the National Association of Principals of Technical Senior High Schools and published by Sangaku Tsushinsha.