DO需要客户的公司印章和签名很重要，因为这是我们的客户已收到产品的证据

DO需要客户的公司印章和签名很重要，因为这是我们的客户已收到产品的证据。

Results (English) 1:

It is important that the DO requires the customer's company stamp and signature as this is proof that our customer has received the product.

Results (English) 2:

It is important that do needs the customer's company seal and signature, because this is the evidence that our customer has received the product.

Results (English) 3:

It is important to DO the company seal and signature of the customer, because this is the evidence that our customer has received the product.