据堆积过程，把自然泥石流堆积地貌分为古泥石流台地、老泥石流台地和近代泥石流长柄扇。
According to the genesis, the accumulational landform of debris flow may be classified into natural and man-made ones.
本文从降雨、河槽侵蚀机理等方面进行了成因探讨，并提出了以疏导工程防止泥石流改道、控制古堆体活动为主的整治对策。
The chemical erosion mechanism of slide board in casting of Ca-treated steel is analyzed, the research situation at home and abroad about it introduced.
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