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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              ​端​三​分,​長​端​六​分​。</s>
              <s id="N120C6">a​之​重​四​十​斤,e
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              ​力​必​定​二​十​斤​。</s>
              <s id="N120CB">​依​第​十​九​款​比​例,a
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              ​與e​二​倍,​長​端​與​短​端​亦​二​倍​。</s>
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              <s id="N120D7">​第​三​十​七​款 ​挑​槓​平​在​支​磯​之​上,​頭​在​磯,​重​在​中,
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              ​力​在​柄​之​比​例​。</s>
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              <s id="N120E1"> ​從a​重​到​支​磯​是​槓​之​分​與​挑​槓​比
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              ​例,​就​是​力​與​重​等​。</s>
              <s id="N120E6">​假​如i​至o​九​分,
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              u​至o​三​分,​是​為​三​分​之​一​。</s>
              <s id="N120EB">​所​以​重
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              ​六​十​斤,​力​止​二​十​斤​也​。</s>
              <s id="N120F0">​蓋​係​重​愈​近
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