These include structures like a wide blade at the top of the hip bone that allows for more muscle attachments to help in balancing.

这些包括在髋骨顶部的宽骨片结构，允许更多的肌肉附着于其上，帮助平衡。

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Under the plan, knives with blades that are 2.36 inches or shorter and less than a half-inch wide will be allowed in airline cabins so long as the blade is not fixed or does not lock into place.

CNN: U.S. to keep restriction on small knives on planes for now

Under the new rules outlined this week, knives with blades no longer than 2.36 inches (6 centimeters) and less than a half-inch wide will be allowed in airline cabins as long as the blade is retractable and does not lock into place.

CNN: March 10, 2013 -- Updated 0334 GMT (1134 HKT)

Under the new rules, which go into effect April 25, knives with blades that are 2.36 inches (6 centimeters) or shorter and less than a half-inch wide will be allowed in airline cabins so long as the blade is not fixed or does not lock into place.

CNN: TSA chief faces critics, says new knife policy will stand