来自苏绍景的问题
这段英文啥意思Thekeywastouseapulleysystemthatwouldmagnifytheappliedforce.Sotheyriggedupatent-shapedscaffolddirectlyabovethetipofthehorizontalcolumn,withpulleyssuspendedfromthescaffoldsapex.Theideawasthatas
这段英文啥意思
Thekeywastouseapulleysystemthatwouldmagnifytheappliedforce.Sotheyriggedupatent-shapedscaffolddirectlyabovethetipofthehorizontalcolumn,withpulleyssuspendedfromthescaffoldsapex.Theideawasthatasoneendofthecolumnrose,thebasewouldrollacrossthegroundonatrolley.
怎么都不看不懂.谁能给我讲讲
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2020-12-30 00:45