"Coal tools safety."; "Kennametal. Mining Tool Group."; "Mine roof bolting--Safety measures.", "Coal-mining machinery--Safety measures.", "Coal augers--Safety measures.", "Mining machinery--Safety measures.", "Bits (Drilling and boring)--Safety measures.", "Coal mines and mining--Safety measures."; "Kennametal. Mining Tool Group."; "1978"; "

Pamphlet.

"; ""; "P18962"; "pec"; "Bits (Drilling and boring)--Safety measures.", "Mine roof bolting--Safety measures.", "Mining machinery--Safety measures.", "Coal-mining machinery--Safety measures.", "Coal augers--Safety measures.", "Coal mines and mining--Safety measures."; "14256"; .