Cleaning method for ultra-violet waste water treatment reactor
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Go-devil extracting core from pipe driven into place
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Method for removing dents from oil pipe lines
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Preventing escape of harmful substances from waste disposal site
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Heating appts. for plastic pipes prior to subsoil laying
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Method and device for replacing a pipeline buried in the ground
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Union for large pipes
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Filter pipe for wells
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Civil engineering process to create excavations in waste dumps, tips, etc
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Process for removing an earth core from a trenchless pipe and pig to carry out the process
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Procedure for performing civil engineering work
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Electrically testable plastic pipe jointing for underground water - is sealed at two sepd. points by compression of elastic rings into grooves when bevelled ends of pipe encounter collar of sleeve
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Method of sinking and sealing an explosive well
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Automotive fuel storage and delivery system - removes vapours formed during storage and delivery to prevent formation of explosive mixts.
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Method and device for removing mercury from inner tube surfaces
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Washing soil to remove harmful contaminants - by washing comminuted soil in a high pressure washing vessel using a supercritical gas
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Continuous selective water cleaning - uses adsorption on separated concentrate to be mixed with separated permeate for selective removal of small concentrations of matter
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Downwards-flow water filter with biological and mechanical filter - where upper biological layer has aeration system made up of removable horizontal pipe array which can be raised and lowered in filter tank
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PLANT FOR SEPARATING LIQUID OR GASEOUS MIXTURES
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SHEATHED PIPELINE FOR CONVEYING GASEOUS OR LIQUID MEDIA
