ladder scaffold（梯式脚手架）是什么意思？音标发音+图解场景

梯式脚手架 /ˈladə ˈskafəʊld/ n

English: ladder scaffold · 梯式脚手架

释义：Movable structure made up of two vertical ladders and a work platform as well as wheels fitted with blocking devices.

这个词出现在以下图解场景（1）