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一.材料 1.长2米,宽3厘米,厚1.5厘米,直木尺一支。如图1. 2.长1.92米,宽、厚同上尺规格,但一端为半圆形的直木尺。如图2. 3.长1.02米,宽1.4厘米,厚1厘米,直木尺各一个。如图3. 4.蜂膀螺丝1个(长10厘米,直径0.6厘米左右)中间有一挡片,下端杆有尖)。小螺丝2个(长2.5厘米,直径约为0.5厘米)。如图4. 5.长20厘米,顶宽7.5厘米,厚1厘米,小块木板一块。如图5. 3.将2米的尺另一面上(即与上尺重叠的面)以钻孔的中心点分别量出1米、1.067米、1.25米、1.80米四个点,并在各点上钻一孔。 4.将1.92米的尺由钻孔中心量找出1.062米与1.25米各点钻孔,然后将2个1.02米的小直尺分别由一端钻孔固定在该尺并排左、右边上(固定两尺时一定
A material 1. 2 meters long, 3 cm wide, 1.5 cm thick, a straight wooden ruler. As shown in Figure 1. 2. Length 1.92 m, width, thickness with the size of the above specifications, but at one end of the semicircle straight wooden ruler. As shown in Figure 2. 3. Length 1.02 m, width 1.4 cm, 1 cm thick, each straight wooden ruler. As shown in Figure 3. 4. The bee screws 1 (10 cm long, about 0.6 cm in diameter) in the middle of a flap, the lower rod tip). 2 small screws (2.5 cm long, about 0.5 cm in diameter). Figure 4. 5. 20 cm long, 7.5 cm wide, 1 cm thick, a small piece of wood. As shown in Figure 5. 3. The other side of the 2-meter scale (that is, the surface overlaps with the foot) to measure the center of the hole were measured at 1 m, 1.067 m, 1.25 m, 1.80 m four points, Drill a hole. 4. The 1.92-meter-long hole from the center of the hole to find 1.062 meters and 1.25 meters of each hole, and then two 1.02-meter small ruler from one end of the drill hole fixed to the side by side left and right (fixed Two feet when certain