特點：
特別適用于在有限的空間內使用，例如狹窄的人行道和走廊；
能輕松自如地在樓梯和其它扶手梯上搭設；
單寬式的設計，可以推著穿過一般的門；
輕便，但不失穩固；
易于攜帶，可拆下來放進小型貨車裝運。
Characteristics:
It is designed for use in confined spaces such as narrow alleyways and corridors.
It is allowed to be erected on escalators and stairways.
It can be rolled through standard doors.
It is light convenient and firm.
It can be put into the van for transportation.
