platform ladder meaning in English

平台梯架
椎台梯子

The knife switch overhauls the platform ladder
刀闸检修平台梯刀闸检修平台梯
The knife switch overhauls the platform ladder to be composed by two parts , foundation for metal material manufacture , ladder body and platform for glass fiber reinforced plastic insulation materialmanufacture
刀闸检修平台梯由两部分组成，底座为金属材料制作，梯身及平台为玻璃钢绝缘材料制作。