selective filling

selective filling

[si′lek·tiv ′fil·iŋ]
(mining engineering)
Filling by hand so that stone or dirt is rejected and only clean coal or ore is loaded.
References in periodicals archive ?
Due to its outstanding selective filling characteristics, this is particularly well suited for use as a resin retanning agent for automobile leather.
With selective filling, their permeability to air can be precisely adapted to a specific process and if damaged, the defective single segment can simply be replaced, rather than the entire belt.
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