| http://www.w3.org/ns/prov#value | - Preferably, and especially in case the ultrasonic built-in pre-treatment implement is used with cleaning or stain-removing compositions containing bleach compounds, the ultrasonic horn, or sonotrode, will be kept at a temperature of from about 30??? C. to 100??? C., so as to activate the bleach and enhance the stain-removing efficacy of the composition.
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