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Q10783
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What is the purpose of vertical rib with round shape on its top in bottom frame of window?
Q10784
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Which screw thread of 55 Degree included angle and depth of thread is 0.6403 p is used in general engineering fasteners?
Q10785
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Which screw thread of 47? Degree included angle is used in electrical and instrument screws?
Q10786
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Which is the material used in construction of navy boats?
Q10787
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What is the purpose of glass lining of valves, pipes and pumps?