useful sentence：
               Our quality is based solely on our sales samples 我们的质量完全以货样为准。

after-sales service
售后服务
Freedom Group is known for their quality products and after-sales service.
弗瑞登集团以產品品质与售后服务而闻名。

assemble
v. 聚集；组装
The bookshelves are easy to assemble.
这些书架很容易组装。

customer satisfaction
客户满意（度）
Our customer satisfaction scores are among the best in the industry.
我们的客服满意度在业界名列前茅。

customer service hotline
客服热线
For any queries, please call our customer service hotline at 0800080123.
如需任何查询，请打我们的客服热线0800080123。

defer payment
延后付款
Can I defer payment?
我可以延后付款吗？

delivery
n. 递送
I'm just calling to see if the delivery of your Cambridge Sofa went OK.
我只是打来看看您的剑桥沙发是不是顺利送过去了。

installation
n. 安装
The installation of a new heating system will take two weeks.
新暖气系统的安装需要两个星期。