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Aparri is a first class municipality in the province of Cagayan, Luzon, Philippines. It sits at the mouth of the Cagayan River, the longest river in the Philippines, about 55 miles north of Tuguegarao, the provincial capital.
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A National Measurement System for Radiometry, Photometry, and Pyrometry Based Upon Absolute Detectors 0 out of 5 stars based on 0 ratings.