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The phrase 'by vacuum' is correct and usable in written English.
This phrase is generally used to describe a method of cleaning that relies on a vacuum cleaner such as a carpet cleaner or a dust-buster. For example, "The floor had to be cleaned by vacuum due to the mud that was tracked in from the storm."
Exact(60)
The metal is further purified by vacuum distillation.
They are purified by vacuum fractional distillation or by chromatography.
"We are no longer impressed by vacuum cleaners and refrigerators".
Acrylic acid was purified by vacuum distillation.
Crude products were purified by vacuum distillation.
These cracks were probably caused by vacuum during SEM observation.
It was assumed to be surrounded by vacuum.
The residual methylene chloride was then evaporated by vacuum.
The resulting supernatant was then carefully removed by vacuum.
Emory polishing wheel 22. Pulp remove by vacuum 23.
The monomer was further purified by vacuum distillation over CaH2.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com