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mechanical binding

bookbinding using a special device, e.g. spiral binding or comb binding

COMMENT: The main types of mechanical binding are: plastic comb binding, where square holes are made in each leaf, into which the teeth of the comb fit; spiral binding, where the series of round holes are made in the leaves and a wire shaped like a spring is passed through them; ring binding, where only two or four holes are made in each leaf and heavy rings are fitted through them.

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