折叠式活动护栏是什么？

一种折叠式活动护栏，包括若干立柱与活动的横梁单元，其特征在于，横梁单元包括横梁和连接铰，连接铰设置在横梁的端部，相邻横梁之间利用连接铰通过连杆和销杆连接，连接铰的两端设置有便于销杆穿入的销孔，所述立柱上部与横梁活动连接、下部通过预埋在路面以下的预埋套管与路面活动连接。 A folding guardrail activities, including the activities of a number of column and beam elements, characterized in that the connecting beams and beam unit includes hinges, hinge connecting the ends of the beam is set, use connections between a

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