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safety board

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safety board [′sāf·tē ‚bȯrd]
(petroleum engineering)
A board placed in a derrick for a worker to stand on when handling drill rods at single, double, triple, or quadruple levels; the boards are placed at suitable heights to handle a stand of drill rods for that number of joints.


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The National Transportation Safety Board met this week and recommended numerous changes in how medical helicopter companies are managed and in the way the helicopters are equipped.
Congress modeled CSB after the National Transportation Safety Board (NTSB), which has a similar public safety mission.
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