Removes the next reference object in this queue, blocking until one becomes available.

从队列中删除下一个引用对象，阻塞直到有一个可用。

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Removes the next reference object in this queue, blocking until either one becomes available or the given timeout period expires.

从队列中删除下一个引用对象，阻塞直到有一个可用或给定超时期满。

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CONCLUSION Anatomic reference data are provided for the depth of inserting the needles of blocking of the phrenic nerve and preventing the occurrence of complication.

结论：为膈神经穿刺的入路进针深度和预防并发症的发生提供了解剖学参考依据。

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