In one side of the slide carriage, there is limit cam, response to the limit switch, to realize the broaching and returning function of the machine tool.

The Six dynasties tomb is rock pit with stone chamber, yielded celadon bowls, bronze Wuzhu coins, and iron scrapers, and dated to the Jin dynasty.

The iron-based mixed powder for powder metallurgy can give an iron powder sinter having improved machinability while retaining intact strength.