工作系统的条件。系统元素消除了工作系统中的人员遭受伤害的可能性。工作安全是“免受”威胁的威胁，因此是理想的目标。
The condition of a work system resp. the system elements that eliminates the possibility of people in the work system suffering from injuries. Safety at work is "being free of" threats and, thus, is an ideal goal.
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