000			00364nam a2200169Ia 4500
008			240220s9999 xx 000 0 und d
041			_aENG
100			_aChugh C. P.
245		0	_aDrilling technology
260			_aNULL
260			_bOxonian Press Pvt. Ltd.
260			_c1985
300			_a567p.
365			_b71.5
650			_aMECHANICAL
942			_cDBK
999			_c22354 _d22354