00839naa#a2200193#i#450# EN\\bibl\67047 20241227030921.5 1998-8990 20230706b2023####ek#y0engy0150####ca RU ENSURING THE SAFETY OF WELDED JOINTS OF OIL AND GAS EQUIPMENT HOUSINGS BY ULTRASONIC SHOCK TREATMENT Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2023 10 с. Journal article local Определение твердости вдавливанием шариков, конусов, пирамид, цилиндров, призм (индентеров). 620.178.15 Andryushkin Alexander Yu. Rustamova Mashkhura U. Kadochnikova Elena N. journals.igps.ru