16mm Filmography
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Roof Bolting In Coal Mines

Duration: 26 min

Year Published: 1964

Creator: U S Dept Of Labor

Format: 16mm

Color: Color

Sound: sound

Description: Explains the principles and purposes of roof bolting in coal mining. Coordinates mining operations and bolting methods, and stresses safety throughout the roof control process.

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Original permalink · Record added: 2023-02-27 03:45:05