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Atlas Copco authorities borehole British capacity Cast Iron cent chemical chlorine Civil Engineers Committee Company completed concrete construction Corporation corrosion cost Council County Cradley Heath cubic metres diameter District drilling dunams EDECO electric equipment excavation experience feet ferrules ﬁeld ﬁgure ﬁlters ﬁltration ﬁrm ﬁrst ﬁtted ﬁttings ﬁve ﬂood ﬂoor ﬂow gallons per day hydraulic Imperial Chemical Industries increased industrial installed irrigation joints Limited llllllllllllllllllllllllllllll London machine Manchester manufacture meter Metropolitan Water Board million gallons Minister of Housing Ministry motor Oﬂice operation pipe pipeline plant pressure prestressed prestressed concrete problem pumping station qualiﬁcations reservoir River Road scheme steel storage Street surface tank Telegrams Telephone tion tunnel turbine unit valve Water Act Water Board Water Engineer water mains water supply water treatment water turbine water undertakers Waterworks