000 00274nam a2200121Ia 4500
008 220811s9999 xx 000 0 und d
245 _aPATENT JOURNAL MECHANICAL ENGINEERING
260 _c2019-2019
500 _a"1,2"
500 _a2019
500 _aJAN-JUN
942 _cBV
999 _c23631
_d23631