Gate valve :   manual of installation, use and maintenance. 
 Tersephanou Nicosia Pipeline = Αγωγός Τερσεφάνου Λευκωσία 

 - [S.I.] :  Di Nicola,  [19--]. 
 - 7 p. :  photographs ;  32 cm. 
<br/><br/> Also available in digital form. 
<br/><br/><label>Subjects--Index Terms: </label>Gate valves. Βαλβίδες πύλης. 
<br/><br/><label>Dewey Class. No.: </label>621.867