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Photos depicting the aftermath of antique boiler explosion on July 29, 2001 in Medina, Ohio.  

8. Crown sheet heavy erosion one thread engagement
9. Crown sheet one thread engagement
10. Crown sheet two thread engagement
11. Crown sheet thickness 0.085" and 0.105"
12. Crown sheet thickness of 0.85" and 0.105"
13. Crown stay bolts in firebox reduced area from 1" to 0.700" and 0.600"
14. Crown stay bolts. Two displaced threads two and less than two threads engagement