000			00332nam a2200133Ia 4500
008			180611s9999||||xx |||||||||||||| ||und||
041			_aen
082			_a621.55.
100			_aGUTHRIE, A
245		0	_aVacuum Ezuipment and Techinques
260			_aNew York _bMcGraw-hill book Publishers _c1949
300			_axviii, 264
942			_cLL
999			_c25926 _d25926