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Anonymous, 2013. MS EN 12504-4 Testing concrete in structures-Part 4: Determination of ultrasonic pulse velocity. Department of Standards Malaysia, Cyberjaya, Malaysia. http://webcache.googleusercontent.com/search?q=cache:YXpx8RZRemwJ:www.msonline.gov.my/download_file.php%3Ffile%3D31483%26source%3Dproduction+&cd=1&hl=en&ct=clnk&gl=pk&client=firefox-b

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