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What do you mean by indentured labour |
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Answer» A bonded labourer under contract to work for an employer for a specfic amount of time, to pay off his passage new country or home. When ethyne is burnt in air incomplete burning takes place and produce sooty flame due to limited supply oxygen present in the air. ... Hence, This oxy-acetylene flame is used for welding and it is not possible to attain such a high temperature with air. Due this reason a mixture of ethyne and air is not used for welding. |
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