በዚህ የክፍያ ስርዓት ከሚከናወኑ ክዋኔዎች የሚጠበቁ ስለሆነ ደህንነት በጣም አስፈላጊ ከሚባሉ አካላት ውስጥ ሌላ ነው ።
Safety was a main objective in the mine, as people's lives depended on the measurements and decisions involved with this line of work.