thoothukudi.nic.inthoothukudi.nic.in/iti/index_htm_files/Electrician Mock Test 2.pdf38 A B c D...
10
thoothukudi.nic.inthoothukudi.nic.in/iti/index_htm_files/Electrician Mock Test 2.pdf38 A B c D Countersinking is done on drilled holes to accommodate counter sunk head of wood screw