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Hörnebo
(OC) Hörnebo slate quarry tunnel in Sweden, where two workers died in a nitroglycerin explosion in 1866 [ 2332×1080 ]
9 Mayıs 2026
![(OC) Hörnebo slate quarry tunnel in Sweden, where two workers died in a nitroglycerin explosion in 1866 [ 2332×1080 ]](https://wp.rifat.org/wp-content/uploads/2026/05/8tbbp65x6ctg1-scaled.jpeg)
