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chuan bo dun wei zhang liang fa de you lai
Author(s): 
Pages: 46
Year: Issue:  10
Journal: Youths Science

Abstract: <正>吨是计量船舶装载能力的单位。可是为什么称吨,而不叫其它什么名称呢?原来这与运酒有关。早在13世纪初期,波罗的海和北海各港口是用LAST(拉斯特)来计算船舶运载能力的。一个LAST约
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