FIELD: packing.
SUBSTANCE: tongue-and-groove plug (10) is intended for a container with tongue-and-groove plug (11) to be placed in the plug neck of the container with the plug. Tongue-and-groove plug (11) has recess (16) of the plug for insertion of an installation tool into it. Plug recess (16) has recess bottom (15) provided with vent hole (23). Tongue-and-groove plug (11) is equipped with vent plug (12) located in plug recess (16), which by means of threaded rod (13) enters internal thread (39) of receiving hole (14) made in bottom (15) of the recess independently of vent hole (23), and comprises cover (29) in the form of a disk, equipped with device (35) for manipulations and connected to threaded rod (13), for sealing vent hole (23) in the closed position of vent plug (12).
EFFECT: simplified ventilation of the container, which is required for extraction of liquid from the container with a plug.
11 cl, 12 dwg
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