The extraction box has the following main functions:
1. Extraction of individual dust footprints on hard surfaces by electrostatic adsorption.
2. Extraction of dust footprints on hard surfaces by electrostatic adsorption.
3. Extraction of individual dust footprints on soft surfaces by electrostatic adsorption.
4. Use dust fixative to protect the dust footprint extracted by electrostatic adsorption.
5. Adhesive the dust footprint with tape and store it on the substrate.
6. Three-dimensional footprint extraction by gypsum method.
