Brand:DOING
Quantity:20
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As we all know, this is a special field, high profit and high risk. So, when you choose a supplier, security will be the most important thing.Except security, technology, quality and oil refining experience are also very important. Since this is a new field, so, no exact rules. In this way, experiences and technology will be the key point. As for the quality, it should be worth of your cost.
