In the following sentence, should there be a comma in front of "pulsed?"

Deposited thin films by means of, and prepared targets for pulsed laser deposition.

  • I can't imagine that sentence being parsed in any meaningful way unless another comma is added—or the existing comma is removed. (That would be a less common option.) As it is, it sounds like it should be two independent clauses separated by a single comma. However, what comes before the first comma is not an independent clause. – Jason Bassford Supports Monica Jul 24 at 4:33

First of all, it is not a sentence.

But this is a proper sentence:

The device deposited thin films by means of, and prepared targets for, pulsed laser deposition.

The second comma is not optional.

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