I did notice this but chose to overlook it for the time being. Thanks for bringing it up.
There is a wonderfully named cylinder manufacturer named the Shanghai Eternal Faith cylinder company that uses a similar play on English words and translation who on pressure vessels they call it China ISO 7866
Now note similar wording on the OP document it states CNG ISO7866 now is this telling us they are certified for Methane (CNG Compressed Natural Gas) or a genuine European ISO 7866 or is it the Chinese fake version raising its head again. Who knows.
But eternal faith with a splash of hope just maybe will get us by filling them.
