No. 10,069 in Spanish

casquillos

Shells or casings, typically of bullets or cartridges.

In a sentence

Los casquillos de la ventana están oxidándose por la humedad.
The casings of the window are rusting due to humidity.
In this sentence, 'casquillos' refers to small mechanical or protective components of a frame, such as a part of a window.
En el tiroteo se encontraron casquillos de bala por toda la escena.
In the shooting, bullet shells were found all over the scene.
Here, 'casquillos' is used to describe the spent cartridge cases left after bullets are fired.
El mecánico encontró casquillos desgastados en el motor, que requerían reemplazo.
The mechanic found worn-out bushings in the engine, which required replacement.
Within this usage, 'casquillos' represents bushing components in mechanical machinery.

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