What is the time of removal the tensor from the newly executed A T Weld?
(i) 15 minutes after pouring.
(ii) 20 minutes after pouring*
(iii) 25 minutes after pouring.
(iv) 30 minutes after pouring.
(i) 15 minutes after pouring.
(ii) 20 minutes after pouring*
(iii) 25 minutes after pouring.
(iv) 30 minutes after pouring.