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光杠杆量測原理即光杠杆鏡尺法量測微小伸長量原理
杠杆原理杠杆是一種簡單機械;一根結實的棍子(最好不會彎又非常輕),就能當作一根杠杆了.上圖中,方形代表重物、圓形代表支持點、箭頭代表用力點,這樣,你看出來了吧?(圖1)中,在杠杆右邊向下用力,就可以把左方的重物…
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