how will it work? the AC in those NEMA are two single phase 120v right? and the AC the device would work on single 230v AC.
Please remove this confusion.
this machine can work in 120v in USA but with converter adapter but it wont be then 3000watts then, it will be only 1400watts or so.
Your picture of the "Chinese" plug is incorrectly labelled.
Although the Chinese standard plug is a little bit different to Australian plugs, it is "plug in" compatible.
The non-angled pin is [b[NEVER[/b] connected to Neutral---it is the
"EARTH"(ground or PE) pin.
I'm not sure if the Chinese convention for the other pins is the same as that in Australia, but in Oz, the standard,
if looking at the pins of a plug is
RIGHT pin Active,
LEFT pin Neutral, non-angled pin, Earth.
Note: After thinking I had that the correct way around, I still got Active & Neutral reversed. The Capitalised version is the correct one!
If you are looking at a power point on the wall, the positions of Active & Neutral are the mirror image of the above, but the Earth remains the same.