All these requirements order operation switch, valves, and corresponding control frequency converter to complete.

所有这些要求顺序操作相应开关、阀门和控制变频器来完成。

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Hence, it is important to monitor closely dangerous factors during operation and switch to surgery treatment in time, in order to improve the recovery rate of patient infected NEC.

因此密切观察手术高危因素并及时转入行外科治疗，提高NEC患儿的治愈率。

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