000 00274nam a2200121Ia 4500
008 220201s1977 xx 000 0 eng d
082 _a621.81
_bDOB-M
100 _aDOBROVOLSKY V
245 0 _aMACHINE ELEMENTS
260 _bMIR MOSCOW
_c1977
300 _a492
942 _2ddc
999 _c30412
_d30412