Seal of approval

• Autores: Lee Shek
• Localización: Mining magazine, ISSN 0308-6631, Nº. 9, 2018, págs. 50-51
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Lee Shek, who is responsible for Hallite technical development in China, looks at the benefits of specifying hydraulic seal systems for powered longwall roof supports.