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Respirable Dust Control 155

Figure 10.12 Voltage induced with and without surfactant.

walls. A charge is then generated by the friction between the water and the nozzle wall
and by viscous interaction between the water and air near the nozzle exit without the
use of compressed air or any electrical power supply. This feature may enable the sys-
tem to be adapted for underground use without additional equipment, such as, a
compressor.

References

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[5] Washington (DC) Handbook of aerosols. 1950.
[6] LaMer V. Air pollution, New York. 1952. p. 607.
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