Objective to simulate the formation of dental calculus by studying the resolution and re-deposition of dental calculus in vitro and to explore the mechanism of dental calculus formation.
目的通过牙结石的体外溶解及再沉积模拟牙结石的形成过程，以探讨牙结石的形成机制。
Dynamic soil erosion processes involve the spatial and time dependent processes of detachment, rill formation, deposition, re rilling from deposited sediment and scouring of rills.
动态土壤侵蚀包括依赖于空间与时间的土壤剥离、细沟的形成、水流中过量泥沙的沉积、沉积泥沙中细沟的再生等物理过程。
Effective measures for prevention of salt deposition such as re-desalting of atmospheric residue and optimization of operating conditions etc. were proposed.
提出了常压重油再脱盐及优化操作条件等行之有效的预防结盐的措施。
Effective measures for prevention of salt deposition such as re-desalting of atmospheric residue and optimization of operating conditions etc. were proposed.
提出了常压重油再脱盐及优化操作条件等行之有效的预防结盐的措施。
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