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students as a group discussed each design idea in light of the criteria described in the needs analysis phase ...design process cost-effective operation they have been used as secondary crushers. Choke feeding is not advisable as it tends to produce particles of irregular size.A design for a hammer crusher (Fig. 2.9) essentially allows a decrease of the elevated pressure of air in the crusher discharging unit [5]. The A-zone beneath the screen is communicated through the hollow ribs and openings in the body side walls with the B-zone around …effective than seemingly elaborate design ideas. We asked the students to individually sketch their soda design idea on a piece of paper,
