She went through the typescript carefully to eliminate all errors from it.

她认真地检查了打字, 除所有的错。

You can see problems that aren't appear in a double-spaced Courier typescript. ( Yes, you could do this in the old days on galley proofs, but that was an expensive luxury for most writers).

（没错，以前在毛条校样时也能发现问题，但是这对于多数作家来说，是费力不讨好的）。

48. Reader: (1) An abridged term for "proofreader" who checks proofs for accuracy. (2) Device which can "read" from magnetic media or, in the case of OCR, from typescript.

校对员，（2）阅读器:（1）核对样，定其正的人员。（2）一种能阅读磁性媒介物的装置，或在光学字符识系统内，能阅读文字的装置。