If the test screen fails to appear, start adjusting.
如果测试屏幕无法显示，就要开始调整。
In the test, the prestressed secondary moment is established by adjusting middle support height.
在试验中，预应力次弯矩是通过调整支座高度来实现的。
In the test, the prestressed secondary moment is established by adjusting middle support height.
在试验中，预应力次弯矩是通过调整支座高度来实现的。
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