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rotationshastigheterna för skivan eller trumman skall vara 660 ± 10 min1 utan belastning och minst 600 min1 med full last.
the disc or drum rotational speed shall be 660 ± 10 min-1 without load and shall not fall below 600 min-1 on full load.
dessutom skall provningarna utföras vid flera rotationshastigheter varvid den lägsta skall vara lika med 30% av fordonets högsta hastighet och den högsta lika med 80% av denna hastighet.
in addition, tests shall be carried out at several rotational speeds, the lowest being equivalent to 30 % of the maximum speed of the vehicle and the highest being equivalent to 80 % of that speed.