FIELD: construction.
SUBSTANCE: invention relates to the field of construction, in particular to mechanical locks of floor panels and a blank of tongues for them. The floor panels which contain a mechanical locking system containing a tongue and grooves, comprising projections and cavities, which are made with a possibility of motion relative to each other, are described.
EFFECT: technical result of the invention consists in the increase of strength of the locking system.
23 cl, 24 dwg
