n. underframe
misc. bottom border
带选中标记的灰底框表示将只安装部分组件。
A grayed box with a check indicates that only part of the component will be installed.
副井井口罐笼置入就是将宽、窄罐笼于井口处置入井筒并卡固于井口底框梁上。
Auxiliary cage into wellhead is to wide, narrow cage into the shaft at the wellhead and disposal of solid card box at the wellhead end of the beam.
对该经济指标计算结果进行分析，从而对底框抗震墙砖房的经济性能作出定量评价。
Quantitative evaluation of the economical performance of the brick masonry buildings with frame shear wall at the bottom is made, based on the analysis of the cost indexes calculated.
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