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US2103871A
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Canal lock
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DE638862C
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Swimming trough sluice with floating troughs moved by pending compressed air
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DE632355C
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Diving sluice with a sluice tunnel operated by pendulous compressed air
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DE630191C
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Floating trough sluice with a sluice channel moved by oscillating compressed air
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DE603919C
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Device for guiding the flexible air ducts connecting the air chambers of a floating lock trough with the air chambers of a counter-float
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DE573280C
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Completion of swimming troughs
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US1886591A
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Sluice or lock
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DE501686C
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Floating lock trough with one or more loading chambers
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DE509019C
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Floating lock trough with one or more loading chambers
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DE457466C
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Floating lock trough with one or more loading chambers
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DE549396C
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Floating lock trough with one or more loading chambers
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