If none of the above does the trick, you may have a misadjusted or faulty fill valve that needs replacement.

如果以上办法还不能解决问题，那么可能是入水阀门不合适或者太劣质，需要重新换一个。

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The misadjusting parameter of the misadjusted telescopic system is used to adjust the focusing posit ion of outgoing beam.

用失调望远系统的失调量变化调节出射光束聚焦点的位置，并对聚焦点的变化范围和光斑大小进行描述。

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