Her deep knowledge of product details, she can order the items that will be used, and describe the confidence to customers to understand and sympathize with her.
Her deep knowledge of the details of the product, you can order products to be available in good order and explained that clients understand and agree with her.
Do you know the details of the product, you can order goods to be used อย่างเป็นระเบียบและ explain confidently customers to understand and agree with you.