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DE3416514A1
|
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Pipe-driving machine of inaccessible diameter
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DE3416513A1
|
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Driving machine for inaccessible pipelines
|
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DE3003826A1
|
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Loose ground tunnelling machine drilling disc - is screw shaped with vibrators near scoops feeding spirally into axial tube
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DE2629324A1
|
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City air raid shelter system - has partitioned tunnel network below existing cellars and underground installations
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US1106038A
|
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Cutter for suction-dredgers.
|
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US1012196A
|
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Apparatus for discharging dredge-hoppers and the like.
|
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GB191010068A
|
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Improved Method of and Arrangement for Removing Dredged Material from Ships' Holds, Hopper Barges and the like.
|
|
GB190410900A
|
|
Adjustable Dredger Head for Suction Dredgers.
|
|
GB190410899A
|
|
Improvements in Suction Dredging Apparatus.
|
|
US776050A
|
|
Dredging device.
|
|
US776051A
|
|
Adjustable dredger-head for suction-dredges.
|
|
US708541A
|
|
Hydraulic device for emptying dredging-scows.
|
|
GB190016797A
|
|
Improved Device for Emptying Dredging Boats.
|
|
US776049A
|
|
Dredging apparatus.
|
|
GB189819239A
|
|
Improvements in Dredging Apparatus.
|
