在施工中很容易发生质量问题。
而且所有产品如发生质量问题本公司无条件退款。
And all products, such as quality problems occur the Company unconditional refund.
用户购机安装三个月后，发生质量问题，且可以进行修复的产品。
The products with quality problem that may be recovered three months later since installation.
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