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单词 θ212603
释义
society > occupation and work > equipment > ladder > scaffolding > [noun] > for cleaning or painting windows (3)
window cleaner1836

Originally: a supportive apparatus fixed to a windowsill, allowing windows on upper floors to be cleaned safely from the outside (obsolete). Later…

window jack1843

a type of scaffolding attached to a window opening to enable work to be carried out on the outside of the window; cf. earlier window cleaner, n. 2.

cripple1887

technical. A temporary staging used in cleaning or painting windows: cf. cradle, n.

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