Kata Kunci Pencarian:
- Polonium
- Japanese Federation of Chemical Industry Workers' Unions
- Japanese Federation of Chemical Workers' Unions
- National Federation of Rubber Industry Workers' Unions
- Zensendomei
- Japanese Federation of Chemical and General Workers' Unions
- Japanese Federation of Chemistry Workers' Unions
- International Federation of Building and Wood Workers
- National Organization of All Chemical Workers
- Japan Federation of Energy and Chemistry Workers' Unions
- National Federation of Cement Workers' Unions of Japan
