posters featuring information about proper body mechanics and warmup and stretching exercises and training manuals featuring information about proper body mechanics and warmup and stretching exercises

'bodi':6,20 'exercis':12,26 'featur':2,16 'inform':3,17 'manual':15 'mechan':7,21 'poster':1 'proper':5,19 'stretch':11,25 'train':14 'warmup':9,23

prerecored videocassette tapes and computer programs containing information about proper body mechanics and warmups and stretching exercises

'bodi':11 'comput':5 'contain':7 'exercis':17 'inform':8 'mechan':12 'prerecor':1 'program':6 'proper':10 'stretch':16 'tape':3 'videocassett':2 'warmup':14

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