Zummo Z14 Serie Manual De Usuario página 23

 Be careful if hot liquid is poured into the food processor or blender as it can be
ejected out of the appliance due to a sudden steaming.
 Some versions of this model contain an equipotential terminal in the base to
connect the Earth Tap of other appliances to the Earth Tap of your installation
through this terminal. If you use it, slacken the nuts and washers, couple the Earth
Tap cable of the auxiliary appliance and firmly tighten the nuts and washers again.
This equipotentiality point is indicated with the following symbol:
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: http://www.zummocorp.com/manuales/z14nature.pdf