Development of a mechanical roof breaker for ground control in longwall operations under massive roof : USBM RI 8416, 1980, 80P

✍ Scribed by S. Tandanand

• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 127 KB
• Volume: 18
• Category: Article
• ISSN: 0148-9062
• DOI: 10.1016/0148-9062(81)90382-x