The problem of the effect of oblique tension link on the derricks' cross section frame in the front leg stability calculation of open front derricks remains unsolved.
在前开口井架前大腿的稳定计算理论中一直没有很好的解决井架横截面框架中斜拉杆的作用。
The problem of the effect of oblique tension link on the derricks' cross section frame in the front leg stability calculation of open front derricks remains unsolved.
在前开口井架前大腿的稳定计算理论中一直没有很好的解决井架横截面框架中斜拉杆的作用。
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