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一般催款信應該怎麼寫呀，語氣嚴厲和語氣平和的兩種！

http://info.china.alibaba.com/news/detail/v5003008-d5675508.html

Google是個好幫手。

Greetings,
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7 w" [$ J6 |0 q& }# {( e9 wThank you!