Prezentul standard se refer? la pr?jinile grele de foraj cu sondeze, destinate s? fac? leg?tura ?ntre carotier? sau sap? ?i pr?jinile de foraj, ?n scopul de a asigura ap?sarea necesar? pe talp?.
STAS 5607-1980 history
1980STAS 5607-1980 EOUIPMENT FOR GEOI.OG1CAL IN VESTK; ATI ONS Laminatei drill collars for dnllmg with prospectnig rig
1958STAS 5607-1957 Exploration facilities. Heavy duty rolled drilling metal rod with drill rig