ANALYSIS OF OUT一OF-WORK BEARING SYSTEM OF CONE BITS
Wang Zi-Yu Pen Qi-mei Su Mei-rong Qi shu-ming
西南石油大学学报(自然科学版) . 1987, (3): 72 -86 .  DOI: 10.3863/j.issn.1000-2634.1987.03.011