Graphical symbols for compressing plant :  graphical symbols for general engineering / 
British Standards Institution. 
 - London :  British Standards Institution,  1950. 
 - 11 p. :  ill. ;  23cm. 
 - British standard ;  BS 1553 : Part 3 : 1950 .
 - British standard ;  BS 1553 : Part 3 : 1950 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant engineering--Materials handling.<br/>Visual communication--Signs and symbols.