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梯形钢屋架下弦杆常用截面形式是

单选题
2021-09-01 21:06
A、两不等边角钢短边相连,短边尖向下
B、两不等边角钢短边相连,短边尖向上
C、两不等边角钢长边相连,长边尖向上
D、两不等边角钢长边相连,长边尖向下
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正确答案
B

试题解析

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