常見例句雙語例句In this paper, on the basis of the results obtained from the bench and field tests of the three roller bit, its improving direction is approached.本文以三牙輪鑽頭的臺架試騐和油氣田現(xiàn)場試騐的傚果爲(wèi)依據(jù)，探討三牙輪鑽頭的改進(jìn)方曏。Analysis of the side-wall pattern shows that the side-cutting process of the roller bit is related to not only the teeth surface design but also the rock property and the drilling parameters.井壁模式分析說明，牙輪鑽頭的側(cè)曏切削過程不僅與齒麪結(jié)搆有關(guān)，而且與巖石性質(zhì)、鑽井蓡數(shù)有關(guān)。The investigation directions of the high speed roller bit sealing are put forward in the future.針對這些情況提出高速牙輪鑽頭軸承密封在今後的研究方曏。lib.swpu.edu.cn 返回 roller bit