Закрите Акціонерне Товариство "Ново-Краматорський Машинобудівний Завод"
Закрытое акционерное общество "Ново-Краматорский машиностроительный завод"
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Publication of UA49238ApublicationCriticalpatent/UA49238A/en
Apparatus for drilling wells of no-round cross-section has a screw drill mill, with as at least four drill beams hawing drill heads, rotary drives and drives of the drill mill displacement.
UA2001096260A2001-09-112001-09-11Apparatus for drilling wells of not-round cross-section
UA49238A
(en)