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avoid danger.
20. Never disassemble, repair, or modify this unit by yourself.
21. User manual must have such below warning.
a). This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction concerning use
of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the
appliance.
b). If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
c). The new hose-sets supplied with the appliance are to be used and that old
hose-sets should not be reused.