Thank you very much for your order. We have agreed to book your Order No. 22344 for table-cloths and are sending you here with our Sales Confirmation No. SC-30 in duplicate.
Then, within each pair of duplicates, one contact is selected as the duplicate and the other contact is retained in the address book.
然后，每一对重复联系人中，有一个联系人会被选为重复的联系人，另一个保留。
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This paper expounds the significance and paths of duplicate checking of Chinese book cataloguing, and points out the common problems in duplicate checking, and advances some countermeasures.