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Essential instructions should, if possible, be written on the products.
Since some users probably will forget the instructions and therefore handle the products incorrectly. To
avoid this, essential and non abandoned handgrip should be described directly on the objects.
Below is an example of a product where this is the case (the control devices to a mobile crane) and where it
is not (the charger to an electric toothbrush).
Control panel to a smaller mobile
crane.
If the operator misunderstand the
instructions it may lead to serious
mishaps ....
How charging an electric toothbrush
This text can be read in the manual, among a
host of less important instructions. Even if the
user reads the text and also adds the charging
time and other facts about the charging in his
memory, it is likely that he forgets them long
before the toothbrush is worn out. Which, among
other things, may result in the risk that he
charges the toothbrush for too short time and
thus never gets a full using. This risk had easily
been reduced if the manufacturer had added
information about the charging time on the
charger.
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