| 摘要 |
A set for restricting the operation of a spray valve of a flask comprising three main parts, namely: a shoulder, a collar and a lid. The shoulder of the set rests on the shoulder of the flask and is connected to a mouth of the flask by projections from the neck of the set. The shoulder of the set is also solidly linked to the collar of the set by an indentation. The collar constitutes a circular section ring that fits inside a mouth of the of the set's shoulder. The lid constitutes a cylindrical piece having a top with a peripheral skirt. The lid is connected to the collar of the set by an extension and a pin. The lid rotates about the pin through a limited arc and has a closed position. When the lid is in the closed position, it encloses a valve of the flask and restricts the operation of the valve.
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