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method of counting volume of earthwork in ancient
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method of counting volume of earthwork in ancient
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工学
中国水利科学技术史
释
method of counting volume of earthwork in ancient
历步减土
古代土方工程中按取土距离计算运、填劳动定额的方法。即在不同劳动条件下,一个标准劳动工日在运土方面做功相等,运输距离每增加一步,运输土方量就要相应合理地减少一些。
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friction control
friction damper
friction damping
friction dissipation
friction drag
friction drag, fractional drag
friction drive
friction effect
friction factor
frictionfactor
friction feed
friction force
friction force microscopy
friction heat
friction heat, fractional heat
friction hoist
friction initiation
friction layer
frictionless flow
friction loss
friction materials
frictionmeter
friction of metal working
friction pairs
friction pile
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