quartz
['In-depth survey report: control technology for crystalline silica exposure during pavement milling using a Roadtec Milling Machine equipped with a local exhaust ventilation system', 'quartz', 'report', 'National Institute for Occupational Safety and Health', 'In-depth survey report: control technology for crystalline silica exposure during pavement milling using a Roadtec Milling Machine equipped with a local exhaust ventilation system']