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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A form of indicator in which the occurrence of an event is signalled by movement of a hinged shutter over a contrasting surface in a manner analogous to the movement of an eyelid in blinking.  1, record 1, English, - doll%26rsquo%3Bs%20eye

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Type d'indicateur qui signale l'apparition d'un phénomène par le mouvement d'un volet se levant ou s'abaissant sur une surface faisant contraste, à la façon des mouvements d'une paupière au cours d'un clignement.  1, record 1, French, - %26oelig%3Bil%20de%20poup%C3%A9e

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  French

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

"shutter weir". A movable weir consisting of a row of large panels hinged at the bottom and inclined slightly downstream toward the top when the weir is closed.  3, record 3, English, - shutter%20weir

Record number: 3, Textual support number: 1 CONT

Shutter-Dams.... The first dam constructed by movable shutters was probably the one across the river Orb(France).... This dam was raised 3 feet by movable wooden shutters hinged to the top of the dam and held by props placed on their down-stream side. The sluice-openings were closed by stop-planks(poutrelles) placed horizontally, one on top of another and attached to each other by chains.  4, record 3, English, - shutter%20weir

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

Barrages mobiles à hausses. Ce système de barrages diffère des précédents [barrages à pont supérieur] en ce qu'il n'a pas de pont supérieur et que les fermettes ou cadres et la bouchure ne font qu'un, de manière à constituer un panneau unique appelé hausse.  2, record 3, French, - barrage%20mobile%20%C3%A0%20hausses

Record 3,  Textual support,  Spanish