产品售后服务是否到位；

What are after-sale services?

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产品售后服务不佳，缺乏对产品质量故障的预见性。

Poor after-sale products services, the lack of predictability in product quality failures.

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80%的顾客投诉是由20%的产品售后服务引起的。

80% of customer complaints arise from 20% of your products or services.

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