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If the cross sectional area of conductor is less than 100mm². Then specimen must be into testing chamber for freezing for one hour, after that immediately roll specimen around the circular rod of which diameter is specified in uniform speed. Otherwise, the cross sectional area is beyond 100mm².
Then specimen firstly be rolled into a circular & put into chamber for freezing one hour. Afterwards, immediately roll specimen around the rod by opposite direction. Finally, take out of specimen for checking weather its surface has crack or fissure or not.
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