000			00290nam a2200133Ia 4500
008			160710s1977 xx 000 0 und d
082			_a621.885 MAY
100			_aMAYER,E.
245			_aMECHANICAL SEALS
250			_a3
260			_bBUTTERWORTHS _c1977
300			_a291
942			_2ddc _cB
999			_c41435 _d41435