图示结构，截面H转角方向是<img src='https://fb.fbstatic.cn/api/ape-images/1802effaf8f9226.jpg' />
A、顺时针
B、逆时针
C、等于0
D、不能确定
发布时间：2025-11-20 19:07:30
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答案：B
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