Recommended welded connections for pipework 

 - London :   The international instituts of welding,   1965. 
 - pag por cap 
<br/><br/><label>Subjects--Topical Terms: </label><br/>TUBERIAS<br/>SOLDADURAS<br/>TUBERIAS INDUSTRIALES
<br/><br/><label>Universal Decimal Class. No.: </label>621.643