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Escobillón propio para la limpieza de frascos, buretas, butinómetros y otros aparatos de laboratorio, que consiste esencialmente en una porción de cadena metálica destinada a ser introducida en el aparato a limpiar y sujeta por un extremo a un tope terminal, facultativa y preferiblemente provisto de una arandela elástica, que, aparte impedir la caída de la cadena en el interior del frasco o aparato, puede eventualmente servir para obturar la boca del mismo presionando sobre él con un dedo.
Frasco para el entintado de almohadillas o tampones con salida estrangulada y con dispositivo receptor y aislante de las gotas que pudieran desprenderse del mismo.