'Power' tools for your program.
Hierbaum
John L
JL
Mine Safety Appliances Company, Pittsburg, PA, USA.
D004867:Equipment Design; D006801:Humans; D009784:Occupational Diseases / Q000517:prevention & control*; D012134:Respiratory Protective Devices; D012140:Respiratory Tract Diseases / Q000517:prevention & control*; D013673:Technology Assessment, Biomedical