n. midsection
misc. mid section
在液桥中间截面，自由界面半径维持不变。
The radius of the free surface is constant on the middle section of the liquid bridge.
在平截面假定的前提下，将钢筋混凝土L形柱划分为两端弹塑性区、中间为弹性区的三分段杆单元模型。
On the hypothesis of plane cross section, L-shaped reinforced concrete column was divided into three fragment line element of elastoplastic zone at both ends and elastic zone in the middle.
使用1 / 16“钻头，钻一个孔在上面管中间的横截面。这将使天然气逃脱焊接过程。
Using a 1/16" drill bit, drill a hole in the middle of the cross section tube above. This will allow gas to escape during welding."
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