Processing Equipments Used In Guatemala Coal Mines

@article{osti_5324176, title = {Respirable coal mine dust sample processing}, author = {Raymond, L D and Tomb, T F and Parobeck, P S}, abstractNote = {The Federal Coal Mine Health and Safety Act of 1969 established mandatory dust standards for coal mines. Regulatory requirements for complying with the provisions of the Act were prescribed in Title 30, Code of Federal Regulations, Parts 70 and.