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after-sales service, and customer service should be considered.If you want to start a
business, you need to know what you are going to sell. You may think that you can just
sell any product that you think appeals to your target audience. However, you need to
research and study the market before you can actually figure out what to sell to meet the
demands and needs of your customers. Keep in mind that warranty, service, and support
are very important.
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