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We are a team of engineers and thinkers who care about the air we breathe.
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Dhanmondi Office: Aprt # C-1, House # 35, Road # 28 (Old), 15 (New), Dhanmondi R/A, Dhaka-1209, Bangladesh
+88 01955560329,+88 01955560303
wellis@oss.com.bd
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