$$NC$$ contouring is an example of

Consider the following characteristics:

$$1.$$ Single machine tool.
$$2.$$ Manual materials handling system
$$3.$$ Computer control.
$$4.$$ Random sequencing of part to machines.

Which of the above characteristics are associated with flexible manufacturing system?

Flash and gutter are provided in drop forging dies at the following stage:

Cold shut (lap) may occur in products obtained by: