Terentius, Johannes; Zheng, Wang 王徴
,
Yuan xi qi qi tu shuo lu zui 遠西奇器圖說錄最
,
[1830]
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1 - 30
31 - 60
61 - 90
91 - 120
121 - 150
151 - 180
181 - 201
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<
1 - 30
31 - 60
61 - 90
91 - 120
121 - 150
151 - 180
181 - 201
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于支磯,用力愈可少,故挑槓常常省
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力。</
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<
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">第三十八款 有挑槓之分十尺,其本體重四百斤,
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上另有千斤之重,得槓之重徑、重之
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中徑,求挑力。</
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N12109
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<
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id
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N1210E
"> 法曰:o u與o i比例要等四百與
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一千比例。</
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<
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id
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N12113
">假如e o為二尺,就用比
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例,十尺與二尺比例,為一千四百斤。</
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N12118
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兩重之于二百八十斤比例。</
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N1211C
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