每年应对取力器、变速箱进行一次较全面的清洗、检查、维修。
第一次较完整地提供了该类动作各技术阶段的运动学参数和分析。
The paper is the first to provide complete parameters and analysis of its kinematics.
世界石油市场经历了三次重大变化后，目前呈现了一个较稳定的状态。
Petroleum market in the world presents a fairly stable status after three great changes.
提取次数以两次较经济，两次累计提取率可达93.10%。
Extraction than twice the number in the economy, two cumulative rate of 93.10%extraction.
提取次数以两次较经济，两次累计提取率可达93.10%。
Extraction than twice the number in the economy, two cumulative rate of 93.10%extraction.
应用推荐