The special tool-free filter fixed-film, directly from the interior to replace filters, the installation quick and convenient replacement.

特殊免用工具滤网固定片，直接从室内更换滤网，安装快速，更换便利。

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By inspection, when the first measurement is noise free, the filter ignores the second measurement and vice versa.

通过检查，当第一个测量值是无噪声的，那么该滤波器就忽略了第二个测量值，反之亦然。

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A novel model based on free node spline function is put forward to improve the design of the polynomial least square filter.

提出了利用自由节点样条函数来改善多项式最小二乘滤波器设计的模型和方法。

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It estimates that the majority of homes will be able to solve any interference issues by fitting a filter, which it will supply free of charge.

BBC: Man watching TV

Soon, you will also be able to filter by growing practices, like antibiotic-free.

FORBES: Connect

Some scientists, giving their imaginations free rein (and extrapolating from Earth's own sea creatures), have suggested filter-feeders, such as whales.

FORBES: We've Got Company