| 摘要 |
Conditionally self-copying stationery is provided wherein a carbon copy of handwritten material can be made dependently upon the attitude of insertion of a copy sheet. The copy sheet has a carbon back coating on one face thereof and each of the writing sheets in a pad has a carbon front coating on the upper surface thereof. Dependently upon whether the copy sheet is inserted such that its carbon back coating makes contact with a carbon front coating or not, so a carbon copy is selectably made or not made. The copy sheet is the conventional writing guide found in writing pads, and is printed on both sides with writing guidelines.
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