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These hieroglyphes surely don't represent any 'modern technology' (it would be hard to imagine modern looking helicopters in ancient Egypt). Instead, the drawings are nothing more than normal egyptian hieroglyphs like the 'hand' or the 'basket'.
The 'helicopter', for example, consists of two 'forearms' that carry a thing like a table. The lower portion of the 'submarine' is the hieroglyph 'basket'. The basket is - again - held by a forearm.
If you look at the normal egyptian hieroglyphes and compare them to these drawings, you'll see that this is nothing 'special', only misinterpreted constellations of hieroglyphes. I don't know what these symbols represent, but I can say for sure that they're nothing unusual.
The hieroglyph in the scene in the Temple of Set I in Abydos which supposedly showed helicopters, submarines, etc are the result of palimpsest where an inscription has been written on more than once with some of the plaster falling away and the results indeed look like modern craft.