"sind" is a conjugation of the verb "sein".
another translation for "das" in this instance is "those", because afaik there's no real difference between this and that in german/
"those" also sounds normal
Basically and technically, -yes.
It might be misunderstood in a funny way. ;-) (because it has a double meaning)
If you are a woman you wouldn't say that in most situations, If you are a man you wouldn't say that either. Ha Ha You risk to make a complete fool of yourself!! I would actually never say it like this, and try to explain it differently. Most Germans here would possibly agree. :-)
because dieser, dieses and diese are used before nouns, not before a verb.
This link is very helpful, for me, I still make mistakes :) http://www.canoo.net/services/OnlineGrammar/InflectionRules/FRegeln-P/Pron-Poss1.html?MenuId=Word423#Anchor-Formen-11481
Is equipment not uncountable? Therefore I think 'These are my two equipments' is not right. Or? see http://forum.wordreference.com/showthread.php?t=225179
I just can't imagine I would ever say " are my two devices". I'd say "Those are mine", "those two are mine", " Both of those are mine" whatever. I'd never use the noun device like this, gadget perhaps, appliance perhaps,... Device is a typical error a German speaking English well but not fluently, might make.
Actually it literally does. The verb "to be" in English is a copulative verb, and it equates two clauses.
A person might say a different one depending on the situation. If I ask whose devices these are, you might say "these devices are mine." If I ask what these are, you might say "these are my two devices." But the statements still have the same fundamental meaning, even if the preferred form might differ based on context.
Either way, I'd be saying that these two devices belong to me. Even though one form answers "who" questions and the other answers "what" questions, that has to do with purpose, and not meaning.
You can arguably say that one is the correct translation and the other is not, due to the form needed for the context. But you can't say that it's because they don't mean the same thing.
Gerate applies to both appliances and devices?
Eh? No, it doesn't. Gerate means "guessing" (implying that the guessing goes on for quite a while).
Devices or appliances are Geräte with ä (or Geraete if you can't make the ä letter).
What is "it"? Nobody can see what you wrote, so please always quote your entire answer when you have a question.
Very often, if a learner makes a mistake, the error is not in the part of the sentence that the learner guesses -- hence the need for the whole answer.
Even better, provide a screenshot showing the question and your answer exactly as you typed it -- upload it to a website somewhere (e.g. imgur) and tell us the URL. Your fingers might have slipped and what you actually typed might not be what you thought you typed.