19 D7 A pr on P la t e F eeder with F ines R etr iev al S y st em D7 A pr on P la t e F eeder with h y dr aulic dr iv e D7 A pr on P la t e F eeder with elec tr o -mechanical dr iv e D4 A pr on P la t e F eeder installed in a c onfned spac e D9 A pr on P la t e F eeder with elec tr o -mechanical dr iv e D9 A pr on P la t e F eeder f or ming par t of the F ully M obile Slewing Siz er S ta tion