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![Make a manual vacuum pump for under $20 by converting a bicycle ...]()
www.instructables.comA vacuum pump is just an air pump that you use for sucking rather than blowing. You can convert an old-fashioned floor pump (bike pump) into a v...瀏覽：1279
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日期：2024-08-21
A vacuum pump is just an air pump that you use for sucking rather than blowing. You can convert an old-fashioned floor pump (bike pump) into a v......
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