问题
单项选择题
倒落式人字抱杆整立杆塔,抱杆的有效长度应控制在一个适合高度,一般为杆塔重心高度的()倍。
A、0.8~1.1
B、1.1~1.2;
C、1.2~1.3;
D、0.6~1.0。
答案
参考答案:D
倒落式人字抱杆整立杆塔,抱杆的有效长度应控制在一个适合高度,一般为杆塔重心高度的()倍。
A、0.8~1.1
B、1.1~1.2;
C、1.2~1.3;
D、0.6~1.0。
参考答案:D
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