Based upon experiments, optimum scooping speeds are proposed for various kinds of materials in order to minimize the necessary work to be done to scoop up a unit quantity of material.
为使挖取单位物料所需的功为最小值，通过试验提出了对不同物料的合理挖取速度。
Based upon experiments, optimum scooping speeds are proposed for various kinds of materials in order to minimize the necessary work to be done to scoop up a unit quantity of material.
为使挖取单位物料所需的功为最小值，通过试验提出了对不同物料的合理挖取速度。
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