澳门六合彩高手

Safety and health signs

31 Jul 2009 - Maurici Gàlofré Vilà, 澳门六合彩高手 Safety & Security Department

Safety and/or health signs refer to a specific object, activity or situation in the workplace and provide information and instructions by means of a signboard, a colour, an illuminated sign or acoustic signal, a verbal communication or a hand signal.