The internal filter usually consists of a pump/powerhead mounted over a chamber filled with foam (though other media can be used).

Likewise, a mechanical filter would ideally consist only of components with the properties of mass and stiffness, but in reality some damping is present as well.

Most biosand filters consist of similar components.

The filter consists of two differential equations, one for the state estimate and one for the covariance:

Then they are interconnected in parallel and the DC voltage is filtered (the filter consist of capacitors).

Each filter consists of a coil and a capacitor switched in row.

"Circular" polarizing photographic filters consist of a linear polarizer on the front, with a quarter-wave plate on the back.

This filter consisted of successive beds of loose brick, gravel and sand to remove solids from the water.

In its simplest form, the filter can consist entirely of identical sections.

In the example below, the filter set consisted of the first 30% of the core vocabulary.