The element in an electrostatic documentcopyingmachine that is sensitive to light and on which the latent electrostatic image is formed.
在静电文件复印机中，利用光敏作用形成静电潜象的一种元件。
2
In a documentcopyingmachine, a means by which parts of the image of the original is obscured so that it is not produced onto the copy material.
文件复印机上使用的一种方法，将原件映象的某一部分掩盖起来，使其不复印到复印件上。
3
In a documentcopyingmachine, a device for adding to or masking details from an original so that these are incorporated into or deleted from the copies.