The bars are typically designed to be sufficiently sharp so as to penetrate the trash bags but have blunted tops, as shown in FIG 8, so as to avoid impaling or penetrating {TAIL ~ individual items} of {HEAD ~ trash} 
The bars are typically designed to be sufficiently sharp so as to penetrate the trash bags but have blunted tops , as shown in FIG 8 , so as to avoid impaling or penetrating { TAIL ~ individual items } of { HEAD ~ trash }
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