| 摘要 |
A method for actuating a flapper of a valve includes rotating one component of the valve relative to another component of the valve. The rotating causing misaligning if aligned or aligning if misaligned a nonplanar surface on one of the flapper or another component of the valve relative to the other of the flapper or the another component of the valve. Encouraging the flapper to another position pursuant to the rotating. Also included is a method for rotationally actuating a flapper valve.
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