00507nam a2200193Ia 4500 CTU_54146 210402s9999 xx 000 0 und d 35000 620.1 H103 Nguyễn Hải Phân tích dao động máy Nguyễn Hải Hà Nội Khoa học Kỹ thuật 2002 oscillations Minh Trung tâm Học liệu Trường Đại học Cần Thơ