Dredging system

Driving or mining machine

Earth reduction tool

Earth reduction tool

Excavation system employing a jet pump

Extrusion dredging apparatus

Fluid lance apparatus

Fluid seal for maintaining vacuum

Gravel-like material removing device

Hand-held device for exposing buried objects

Hydraulic excavating machine

Jet agitation dredging system

Material transfer apparatus and method

Material transfer apparatus and method

Method and apparatus for beneficiating soils during vacuum...

Method and apparatus for dredging and transporting dredged...

Method and apparatus for mining and metallurgically...

Method and apparatus for pneumatic excavation

Method and device for dredging underwater ground layers

Offshore treasure recovery apparatus