- air discharge grille排气格栅;
- bottom view底视图，仰视图;
- bottom up颠倒，<俗>干杯！;
- bottom sill底槛;
- bottom reinforcement bars底部钢筋;
- bottom rail下冒头;
- bottom pipe distribution下分式管分配;
- bottom of foundation基础底面;
- bottom linen.概要，账本底线;
- bottom intake底取水口;
- bottom hinged ventilator下折翼气窗;
- bottom gate底部闸门;底浇口;底孔闸门;底注式浇口;
- bottom fiber底部纤维;
- bottom fell out底部掉了出来
- bottom cover底盖，后盖;
- bottom chord底弦，下弦;
- bottom block（盛钢桶）桶[包]底大块砖;
- bottom linesn.概要，账本底线( bottom line的名词复数 );
- discharge cone放泄[排出]喷嘴，排矿圆锥，排矿斗;
- from the bottom upadv.从下到上;自下而上;
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