characterised by point of gas entry or exit or by gas flow path

Full Title

Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group ( separating or sorting in general B03, B04, B07) > Adding fluid, other than for crushing or disintegrating by fluid energy ( feeding devices B02C23/02) > Passing gas through crushing or disintegrating zone (, B02C23/38, B02C23/40 take precedence) > characterised by point of gas entry or exit or by gas flow path