举例说明了危险点处与螺旋输送机相关的各种危险，特别是位于移动螺杆和输送机固定部件或周围结构之间的陷阱和剪切点。描述了能够满足一般安全要求的不同安全装置，并通过设计表示例进行了说明。

Gives examples of the kinds of hazards associated with screw conveyors at danger points, in particular trapping and shearing points located between the moving screw and the fixed parts of the conveyor or surrounding structures. Describes different safety devices, illustrated by examples of design sheets, capable of meeting the general safety requirements.