1. The tension rods are connected at right angles within the furniture's ring joints . 2. Eleven years ago, a design flaw in the booster's O-ring joints triggered the fatal Challenger accident. 3. Glass O-ring joints with elastomer O-ring in between. 4. The leak of hot exhaust gases from a booster O-ring joint triggered the fatal Challenger accident of 1986. 5. The Challenger disaster led to a 32-month grounding of all shuttle activities while engineers redesigned the O-ring joints . 6. It was the leak of hot gases through a similar O-ring joint that triggered the fatal Challenger accident of 1986. 7. The outer shell was in two sections, inner and outer drum, and were joined by a bolted ring joint at top and bottom. 8. Despite their certainty of O-ring joint inadequacies as early as 1977, NASA launched an investigation to discover the cause of the disaster. 9. The agency is investigating the cause of charring on insulation that protected O-ring joints on boosters used to launch Columbia on June 20. 10. With a solder ring joint , the joint is heated until a ring of molten solder is visible around the edge of the fitting and allowed to cool.
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