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8 results returnedAbnormal pressures in explosion-proof compartments of electrical mining machines
Guarding trolley wires in mines
Notes pertaining to safety inspections of permissible electric mine equipment
Electrical viewpoint in a complete safety survey of a coal mine
Reducing "nipping" hazards when tramming coal-mining machinery
Prevention of fires caused by electric arcs and sparks from trolley wires
Guarding trolley wires in mines
A study to determine factors causing pressure piling in testing explosion-proof enclosures
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