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A.选用的材料应具备一定的强度
B.加装连接杆后,不影响椅子的折叠和美观
C.改进后的折叠椅应具备较好的稳固性
根据上述设计要求,完成以下任务:
(1)画出连接杆及其连接部件的设计草图,能清晰地表现关键部位的结构(只需画出一侧);
(2)指明连接杆所用的材料,并简要说明连接杆是如何实现折叠的;
(3)制作完成后,需要从结构方面对折叠椅进行①测试和②测试;
(4)除上述改进外,你还可以对折叠椅作哪些具体的改进设计?(至少写两条)。
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同类型试题
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
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