automatic feeding mechanism造句

Purists didn't recommend them for projection because the stereo window wasn't very precise and the mount wasn't stiff enough for the automatic feeding mechanism of some deluxe stereo projectors.
From 1879 to 1905 he secured more than 100 U . S . and foreign patents for sheet metal manufacturing machinery such as roller dies, the sleeve die, automatic feeding mechanisms for press work, power squaring shears, toggle presses, machines for shearing and punching sheet steel, and the original method of corrugating sheets by means of rolls.
It's difficult to find automatic feeding mechanism in a sentence. 用automatic feeding mechanism造句挺难的