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The table below lists the number of OSHA-170 abstracts by keyword value. The keywords are established at the time the abstract is reviewed.

KeyWord Occurances - 33768
Hair89 Hand5210 Hand Brake44
Hand Control64 Hand Tool818 Hand Winch28
Handrail106 Hard Hat262 Harvester199
Hatch87 Haulback Line14 Hazardous Waste31
Head11903 Headache220 Headache Ball36
Headhouse4 Health Care Facility74 Health Care Worker77
Hearing Loss55 Heart1336 Heart Attack1860
Heat593 Heat Exchanger46 Heat Exhaustion384
Heat Stroke320 Heater124 Helicopter51
Hemorrhage197 Hepatitis19 Heptane9
Hernia8 Herniated Disk2 Hexamethyldisilazane2
Hexane22 High Pressure856 High Pressure Pipe22
High Temperature681 High Wind574 Highway895
Highway Shoulder170 Hip1319 Hoist558
Hoisting Mechanism621 Hoistline49 Hold-Down Clamp57
Hopper348 Hopper Car23 Hopper Door11
Horn37 Horse82 Horseplay112
Hose470 Hot Asphalt120 Hot Cooking Oil104
Hot Tar87 Hot Water370 Hot Water Tank24
Hotel28 Housekeeping248 Hydraulic Crane108
Hydraulic Cylinder128 Hydraulic Elevator12 Hydraulic Fluid125
Hydraulic Jack91 Hydraulic Lift249 Hydraulic Line123
Hydraulic Press186 Hydraulic Pump27 Hydraulic Ram66
Hydraulic Table15 Hydraulic Tool89 Hydro-Electric Plant5
Hydrochloric Acid73 Hydrofluoric Acid58 Hydrogen36
Hydrogen Chloride12 Hydrogen Fluoride14 Hydrogen Peroxide18
Hydrogen Selenide1 Hydrogen Sulfide172
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