Lots of drilling and cutting in metalworking workshop.
Unissued / Unused material -
CUs of teeth of saw being ground by machine. VS of grinding machines working on metal. Spacing. Shots of engineers working with drill in engineering works. He is drilling out parts of a metal casting. CU of drill boring into metal. VS of other metal cutting machines. More shots around the works of men and machines. Punched tapes are used to control some of the machines.
(Part has soundtrack - not connected with film).