Hoover BI SD 177 Manuel D'utilisation page 18

As a rule, the more air that can get in and out, the better and more efficient the operation of the
product.
Installation into the cabinet
With the help of another individual, or two, move the appliance
into the cabinet. There are two metal plates at the base of the
appliance. Fit the supplied white spacers (Fig. 8) to these
plates, as per Fig. 9.
Ensure that the lips of the spacers are level with the lip of the cabinet base.
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