The answer is that the manufacturers learned to standardize their product.

答案是制造商学会了标准化他们的产品。

Zhang concurred, pointing to the struggles his company faced in trying to standardize its products in the face of varied demands from clients.

张先生对此表示赞同，他指出，面对客户的各种需求，他的公司在努力实现产品标准化方面遇到了困难。