使用一段时间后，应更换刀片。

Used for a period of time, the blade should be replaced.

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还有使用一段时间后管路里水泡很多，噪音很大。

In addition.It will have much bubble and in pipe after using a period of time. also it makes noisy. all.

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使用一段时间后，安全阀闭小严，调压弹簧变形。

After using period of time, the safety valve shuts young Yan, the accent presses the spring distortion.

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