Taking into account the rotating effect of the drillstring, this paper presents a bifurcating differential equation for the rotating slender drillstring being in tension in vertical well section.
考虑到垂直井中钻柱受拉段在旋转时的转动效应，建立了顶部悬挂、受分布浮重作用的旋转细长钻柱的分岔微分方程。
The tapered I-section Beam-Columns with Slender Web is widely used in portal frame structure for its rational force form.
楔形宽腹工字形截面构件以其合理的受力形式，在门式刚架中被广泛应用。
Long section of the sweaters have been popular, easy to dress up too slender physique, optimize body proportions, and unique leisure temperament.
长款的毛衫一直大受欢迎，轻松将身形装扮得修长，优化身材比例，同时独具休闲气质。
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