- a beam of light一束光;
- a beam of一束束
- bottom up颠倒，<俗>干杯！;
- bottom pipe distribution下分式管分配;
- bottom out降至最低点;停泻回升;
- bottom of foundation基础底面;
- bottom layer of the reinforcing steel底层钢筋;
- bottom intake底取水口;
- bottom gate底部闸门;底浇口;底孔闸门;底注式浇口;
- bottom discharge opening底部卸料孔;
- bottom color[化] 底色;
- bottom chord底弦，下弦;
- bottom linesn.概要，账本底线( bottom line的名词复数 );
- beam with overhangs悬臂梁;
- beam up放大油嘴;
- beam to beam connection梁间结合;
- beam steel梁钢筋;
- beam on elastic foundation弹性地基梁;
- beam grid梁格栅;
- beam design formula梁计算公式;
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