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DE1242516B
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Vacuum well
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DE1012264B
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Device for making boreholes with or without simultaneous lowering of pipes
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DE949039C
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Filters, in particular tube well filters
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DE835446C
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Process for compressing non-plastic masses, such as in particular coarse embedding, and device for carrying out this process
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DE941839C
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Process for the production of sealing fixtures, in particular settlement-free sealing fixtures for dam systems
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DE909905C
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Surface rougher
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DE835872C
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Water-side seal for dams, especially Staudaemme u. like
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DE838279C
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Tube well filter
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DE808450C
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Method and device for increasing the compacting effect of concrete rubble
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DE808451C
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Inside rattle
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DE642788C
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Device for reducing the groundwater upwelling that occurs when emptying shipping and works canals
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