| 摘要 |
A louver valve comprising a casing, a seat within the casing, a drive shaft in the casing, a driven shaft in the casing on the opposite side of the seat from the drive shaft, a louver for opening and closing the valve cooperatively with said seat, said drive shaft being connected to the louver, and said driven shaft being connected to the louver so that rotation of the drive shaft in one direction causes rotation of the driven shaft in an opposite direction, thereby positioning the louver between the valve open and valve closed positions.
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