一种定义
四种语言
The stated safety distances S apply for average operating conditions.
The mean stress is the average of the maximum and minimum stresses.
As a result, ergonomics becomes more important as the average age of employees rises.
The latter option means that Cable Duct E can then be fitted between the columns.
A hand-rail is the primary means of preventing a fall and a useful aid when climbing stairways.
The wires are held securely in the socket by means of a spring-force connection.