求翻译：我可以确信他们已经修订了软件对于2600KL，因为在我检验之前他们已经返工。我提前检验12PCS2600KL，正是为了帮他们确认是否已经改善对于那个问题。是什么意思？

I can be sure that they have revised the software for the 2600KL, because in my test before they rework. My early tests 12PCS2600KL, precisely in order to help them confirm that the problem has been improved for.

I can be sure that they have revised the software for 2600, because in my test KL before they have 264,165 . I am an early test 12 PCS KL 2600, it is precisely in order to help them to identify problems that have been improved.

My might believe firmly they already to revise the software regarding 2600KL before, because examined in me they already do over.I examine 12PCS2600KL ahead of time, is precisely in order to help them to confirm whether already improved regarding that question.

I can be confident they have revised the software for 2600KL, because in my testing they have been reworked. 12PCS2600KL I test, in order to help them confirm that you have improved on that issue.

I can sure they have already revised the software to 2600KL, because they have already done over again before I examined. I examine 12PCS2600KL ahead of time, just in order to help them confirm whether have already improved to that question.