| http://www.w3.org/ns/prov#value | - This low-level portion 96 is drained by a drain 98, which leads to waste or to filter means, not shown. v In operation of both types of apparatus described, the dust-laden gas first passes through an ionizing electrostatic field whereby a charge of one sign is created on the dust particles, such field being created by a high potential applied between an ionizing electrode anda nondischarging elect
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