7 Angels with 7 Last Disasters
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(These seven disasters are another "sign of the end of the age".)
(2) And I saw what looked like a sea of crystal mixed with fire (Crystal can hold a spiritual force, in this case it is the spirit of fire symbolizing the destruction through the seven disasters of chapter 16, see 4:6.)
and, standing next to the sea, (which means unaffected by this destructive force)
those who had overcome the Beast ("Queen" as an example for a famous person worshipped by many fans)
her picture: 
(In Britain E II R is also a symbol for the institutions of the state and the ideology of her ruling class.)
They were holding harps (These harps symbolize a new way of thinking.)
given them by God (3) and sang the song of Moses (This new way of thinking is really quite old with Moses symbolizing the tradition of ancient Jewish prophets.)
the servant of God and the song of the Lamb: (the teachings of Jesus)
"Great and wonderful are your deeds, Lord God Almighty. Just and true are your ways, King of the Nations. (4) Who will not fear you, O Lord, and glorify your name? You alone are holy. (This sentence denounces the worship of saints and their images as on wooden crosses.)
All nations will come and worship you, because your righteous actions have been revealed." (We have understood that the tragedies humanity has to suffer are a planned punishment predicted in the Book of Revelation thousands of years ago.)
(5) After this I saw that the Home of the Testimony in the temple of heaven was open. (The Home of the Testimony symbolizes all ideas, messages and predictions of divine inspiration.)
(6) The seven angels with the seven disasters came from there. (The coming of these angels and their disasters from the Home of the Testimony emphasizes the divine origin of these disasters.)
They were dressed in clean, shining linen (Punishments was deserved and of divine inspiration.)
and had golden (Gold is a symbol for the element of fire and for destructive greed turning people into angels of doom.)
belts around their chests. (7) Then one of the four living creatures gave to the seven angels seven golden bowls filled with the anger of God, (See 5:8.)
who lives for ever and ever. (8) And the temple was filled with smoke (Smoke, a mixture of the Elements fire and air symbolizes destruction through perverted thinking as a mechanism to carry out divine punishment, see 9:2.)
from the glory and power of God, and nobody could enter the temple (the new way of life in the New Age)
until the seven disasters carried by the seven angels were completed. (History here happens according to a predetermined course. The next stage of human development will not come, until the time is due, and all the necessary disasters have been suffered, see 12:12.)