Magento 1.9 - update handle example in magento

Below are the example for update handle.

1) For One Column

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1 2	<update handle="page_one_column"> </update>

2) For Two Column left

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1 2	<update handle="page_two_columns_left"> </update>

3) For Two Column right

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1 2	<update handle="page_two_columns_right"> </update>