The assumption of the trial.Apply a mixture of alum and wood charcoal can get rid of the smell of the shoes.The education variable.Variable costs, coal and alumA variable length of time to smellThe control variable volume ratio between wood charcoal and orange.The benefits expected to be received.1. How can get rid of the smell of the shoes. Without a lot of expense.2. training, skills, and processes video Ta Sciences.3. create the confidence to use the product if there is no stinking shoes.4. the smell inside the shoe will not disturb others.
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