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Individual
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Priority to ES403799ApriorityCriticalpatent/ES403799A3/en
Publication of ES403799A3publicationCriticalpatent/ES403799A3/en
Improvements introduced in water levels with a level body of transparent plastic material, whose cavity is closed at its end by means of a plastic plug, which encloses the level liquid and the level bubble, at the same time as the body of the level and the plug are welded together, characterized in that the plug (5) consists of a plastic material more tenacious than the body material of the level (4). (Machine-translation by Google Translate, not legally binding)
ES403799A1972-06-131972-06-13Improvements introduced in water levels. (Machine-translation by Google Translate, not legally binding)
ExpiredES403799A3
(en)