In the other categories, Canon's position as the world's largest manufacturer of digital cameras and office copying equipment cemented its strong profile among our survey respondents.

The profile equation of brake cam of DD680 series motor vehicles and tool path equation for processing copying cam have been obtained by using analytical theory of cam mechanism.

Involute CAM is an important attachment which produce involute profile in the copying gear grinder; the accuracy of which directly decide the profile accuracy of gear which is grinded.