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1“…In the trend toward improvement of quality assurance, billions of parts per year…”
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2by Abdul Aziz, Mohd Azoddein, Mazrul Nizam, Abu Seman, Wan Mohd Hafizuddin, Wan Yussof, Mariah, Che Mamat, Mohamad, Drani“… limit for workplace exposure is set at 20 parts per million (ppm). The National Institute…”
Published 2017
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3by Musa, Siti Fairus“… ranged from 9.21 to 35.59 parts per thousand; dissolved oxygen ranged from 2.99 to 8.57mg/1; temperature…”
Published 2016
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