Metabo WP 780 Notice Originale page 16

en ENGLISH
Vibration total value (vector sum of three directions)
determined in accordance with EN 60745:
a = Vibration emission value
h, SG
(surface grinding)
a = Vibration emission value
h, DS
(disc sanding)
K = Uncertainty (vibration)
h,SG/DS
Typical A-effective perceived sound levels:
L = Sound pressure level
pA
L = Acoustic power level
WA
K , K = Uncertainty
pA WA
Wear ear protectors!
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