Waterproof cover plate device for outdoor hoisting hole of hydropower station
The utility model discloses a waterproof cover plate device for an outdoor hoisting hole of a hydropower station, which belongs to the technical field of waterproof cover plates and comprises a frame-shaped main body formed by a first square tube, a second square tube and a riffled plate for waterpr...
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Format: | Patent |
Sprache: | chi ; eng |
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