Group B: Routine operation in 48 cases as control.

组48例采用常规手术方式作对照。

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Routine operation reflected the idea of production controlled management.

常规化操作体现了生产的受控管理这一理念。

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Routine operation reflected the idea of production controlled management.

常规化操作体现了生产的受控管理这一理念。

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