In normal condition, air side should not have dirt.

在正常情况下，气侧应没有污垢。

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To observe the condition of pain and the action of toxic and(or) side effects.

采用由弱到强按阶梯给药的方法，观察患者疼痛情况和毒副反应。

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To observe the condition of pain and the action of toxic and(or) side effects.

采用由弱到强按阶梯给药的方法，观察患者疼痛情况和毒副反应。

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