减少固体颗粒对液压油的污染，防止液压冲击和系统发热是防止和减少系统故障行之有效的方法。
The effective method preventing and reducing the defects is to decrease the solid particles for the pollution of hydraulic oil and to avoid the impact and overhead of system.
泥石流固体颗粒级配倒置，影响流速垂线分布、流态与冲击力，是一个十分重要的问题。
The inverse grading of solid particles in debris flow effects the velocity distribution along the vertical the state of motion and the impulse on structure is an important problem.
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