초록 ▼

A dam includes a body (11) made of loose material, for example earth and/or rocks (A), and a water barrier (12) axially extending to the dam body (11), including a waterproofing layered membrane (13) and a zone of waterpermeable loose material (B), on at least one side of the membrane (13), which ca

A dam includes a body (11) made of loose material, for example earth and/or rocks (A), and a water barrier (12) axially extending to the dam body (11), including a waterproofing layered membrane (13) and a zone of waterpermeable loose material (B), on at least one side of the membrane (13), which can be injected with a sealing fluid and is designed to avoid puncturing of the membrane (13) and to allow the monitoring of the leakage water due to failures in the waterproofing membrane (13). The water barrier (12) can be provided inside the dam body or close to the upstream face.

대표청구항 ▼

A dam includes a body (11) made of loose material, for example earth and/or rocks (A), and a water barrier (12) axially extending to the dam body (11), including a waterproofing layered membrane (13) and a zone of waterpermeable loose material (B), on at least one side of the membrane (13), which ca

A dam includes a body (11) made of loose material, for example earth and/or rocks (A), and a water barrier (12) axially extending to the dam body (11), including a waterproofing layered membrane (13) and a zone of waterpermeable loose material (B), on at least one side of the membrane (13), which can be injected with a sealing fluid and is designed to avoid puncturing of the membrane (13) and to allow the monitoring of the leakage water due to failures in the waterproofing membrane (13). The water barrier (12) can be provided inside the dam body or close to the upstream face. on to entirely expose said shutter opening if the stop plate is shifted to said retracted position. 11. A shutter device as claimed in claim 10, further including a retention pin for keeping said stop plate in the stop position against said spring biasing, and said stop plate shifting to said retract position by moving said pin. 12. A shutter device as claimed in claim 11, wherein said stop plate is biased in the second direction by said spring biasing, and swings by said spring biasing in said second direction to said retracted position when said retention pin moves. 13. A shutter device as claimed in claim 2, wherein an f-number in making photograph through said shutter opening only is smaller than f8. 14. A shutter device as claimed in claim 13, wherein the f-number in making photograph through said stop opening is larger than f10. 15. A shutter device as claimed in claim 14, wherein an object distance of said taking lens is substantially 6 m. 16. A shutter device as claimed in claim 2, wherein said camera is a lens-fitted photo film unit. nar with said first outer sheet, said perimetric seal being formed by RF sealing; and (e) a perimetric edge bead injection molded directly onto said laminated perimetric edge. 12. An intraoral x-ray film packet comprising: (a) a first outer sheet having a tensile modulus of at least about 700 Kg/cm2; (b) a second outer sheet; (c) a film chip residing between said first outer sheet and said second outer sheet; (d) a perimetric seal affixing said first outer sheet and said second outer sheet and forming a perimetric laminated edge, said perimetric laminated edge being substantially coplanar with said first outer sheet, said perimetric seal being formed by heat sealing; and (e) a perimetric edge bead injection molded directly onto said laminated perimetric edge. 13. An intraoral x-ray film packet as recited in claim 8 wherein: said transverse seal is formed by RF sealing. 14. An intraoral x-ray film packet as recited in claim 8 wherein: said transverse seal is formed by heat sealing. 15. An intraoral x-ray film packet as recited in claim 10 wherein: said first outer sheet is made more rigid than said second outer sheet by reducing the amount of plasticizer in said thermoplastic material. 16. An intraoral x-ray film packet as recited in claim 10 wherein: said thermoplastic material of said first outer sheet includes l