| 摘要 |
A system of delivering a liquid to pasty product is designed to be installed on a flexible tube on which the user acts by manual pressure to cause the product to come out. The system has a base element that is attached to the open end of the tube, a window associated with a strip that can be moved in opening, and a cap designed to cover the base element having opposite the strip an integral recess capable of allowing the deflection in opening of the strip.
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