内摩擦力是指空气内部各层气流速度的大小或方向不同时，产生的一种相互牵制的力。
n. anelasticity
misc. internal friction
其二为由土壤内摩擦力及土壤对履带板的外摩擦力所产生的推进力。
Another is caused by internal friction in soil and external friction between soil and track-plate face.
FU链运机是利用散状物料具有的内摩擦力和侧摩擦力的特性，进行输送物料的。
FU chain conveyor can transporting particle material by using the properties which the material has the friction and side press force.
影响铸铁压缩试验结果的因素很多，其中最主要的是材料内摩擦力及试件的鼓胀变形。
There 're many factors that influence the result of compression test for cast iron, among which the internal friction of material and the drum deformation of sample are most important.
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