方法：滤纸法。
Adopt filter paper to be filter material.
采用滤纸作为过滤材料。
Screw air compressor used for air filter paper type.
螺杆空气压缩机使用的空气过滤为纸式。
The teacher gave each of us a piece of filter paper before doing the experiment.
做试验前，老师给我们每个人发了一张滤纸。
This paper design a 4-step band pass digital filter.
本文设计了一个4阶带通数字滤波器。
The dry-type air filter is made of a paper element.
干式空气滤清器由纸制造而成。
Segmented filter and its structure, performance as well as applications are shown in this paper.
介绍了叠片式过滤器的结构、性能特点、应用范围和开发前景。
This paper introduce the principle and design of an zero-phase filter.
本文介绍零相移滤波器的工作原理及实现方法。
Basic principles and structure of power active filter is introduced in this paper.
介绍了电力有源滤波器的基本原理和结构。
In part two, this paper discuss a kind of method design microwave active filter.
在第二部分，介绍了一类微波有源滤波器的设计方法。
A new method to design the power filter is proposed in this paper.
本文提出了一种新的滤波器设计方法。
This paper introduces the transform process of filter main body structure.
介绍了过滤机主体结构的改造过程。
The paper presented the performance of various filter media.
介绍了各类过滤材料的性能。
This paper discussed the design of a new type of filter checking robot.
讨论了一种新型滤芯检测机器人的设计。
The paper begins with the principle of adaptive filter, structure and application.
本文介绍了自适应滤波器的基本原理，结构和应用；
This paper proposes a new type hybrid active power filter.
提出了一种新型混合有源滤波器的拓扑结构。
Its principle is to use filter oil on paper can absorb water and filter impurities.
它的原理就是利用滤油纸吸收水分、过滤杂质。
Its principle is to use filter oil on paper can absorb water and filter impurities.
它的原理就是利用滤油纸吸收水分、过滤杂质。
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