Safety in the construction of subgrade (1971)

The excavator loads the dump truck with earth.

The work of a bulldozer.

Forest (shooting from a helicopter).

Instructing workers before the start of clearing the route.

Felling of the forest.

Removal of wood from the cutting area.

The work of the machine for uprooting stumps.

Blasting operations.

Construction of the second railway track.

The signalman gives a sound signal about the approach of the train.

A passing train.

Safety instructions at the excavation site.

Checking the equipment before starting work.

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