In {HEAD ~ one method} of the present invention, {TAIL ~ at least some} of the measuring chambers are arranged side by side, the first light beam and the second light beam being split for equal beams which are guided into the measuring chambers 
In { HEAD ~ one method } of the present invention , { TAIL ~ at least some } of the measuring chambers are arranged side by side , the first light beam and the second light beam being split for equal beams which are guided into the measuring chambers
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