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The exposure of the geotextiles to the elements tween lay down and covering should be a maximum of ____ days.
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Which of the following is formed from the anaerobic oxidation of organic matter?
The number of stages required for the completion of aerobic oxidation is __________
Which of the following is formed from oxidation of organic matter in the presence of oxygen?
Out of the following countries, which country has adopted the standard gauge?
The energy released during the anaerobic oxidation of organic matter is _____ kilo calories.
The unit of rail gauge is expressed in terms of ______
_____ is the amount of oxygen required to oxidize only organic matter in sewage.
Which type of gauge is widely used across the world?
The full form of BOD is __________
The size of cape gauge is _______