| 序号 | 英文 | 音标 | 词性 | 中文 |
| | bottom hole pump | | | 井底沉没式泵 |
| | bottom hole separator | | | 井底油气分离器 |
| | bottom jib | | | 截盘 |
| | bottom joint | | | 底节理 |
| | bottom knife | | | 下刀片 |
| | bottom knife coater | | | 底刀式刮涂填孔机 |
| | bottom land | | | 水泛地, 河滩地 |
| | bottom lateral bracing | | | 底斜[底侧]支撑 |
| | bottom laterals | | | 纵向下平联(结系) |
| | bottom lath | | | 船底板条 |
| | bottom layer | | | 底层 |
| | bottom lead type | | | 底部引线型 |
| | bottom leather | | | 底革 |
| | bottom line | | n. | 帐本底线 |
| | bottom lining | | | 底衬 |
| | bottom load | | | [地质]底移质 |
| | bottom lock lifter bar | | | (车钩)下锁销杆 |
| | bottom longitudinal | | | 船底纵向构件,部底纵材,底部纵骨 |
| | bottom margin | | n. | 底部边距 |
| | bottom member | | | 船底成件[杆件], 船底梁, 底部构件 |
| | bottom mill separator | | | 机座下横梁 |
| | bottom mine | | | 沉底水雷 |
| | bottom moraine | | | 底碛 |
| | bottom mud | | | 淤泥, 底泥 |
| | bottom note | | | 注脚 |
| | bottom of page | | n. | 页脚 |
| | bottom of the heap | | | 堆放, 放一堆, 积累 |
| | bottom opening clarifier | | | 底部卸料的澄清器 |
| | bottom operation uncoupling lever | | | 下开式车钩提杆 |
| | bottom organism | | | 海底生物 |
| | bottom out | | | 降至最低点 |
| | bottom pallet jewel | | | 擒纵叉下钻 |
| | bottom panel | | | [建]底截镶板 |
| | bottom pass | | | 下轧槽, 下排孔型(三辊式轧机中下辊间的孔型) |
| | bottom pavement | | | 铺砌窑(炉)底 |
| | bottom plate | | | 主夹板 |
| | bottom plating | | | 底板, 船底板 |
| | bottom plough | | | 铧式犁 |
| | bottom plunger | | | 下冲杆, 下模冲 |
| | bottom pouring | | | 下[底]注 |
| | bottom price | | | 最低价格 |
| | bottom product | | | (釜、塔)底部产物, 残留产物 |
| | bottom prop | | | (炉底)支柱 |
| | bottom pump | | | 井底车场水泵 |
| | bottom punch | | | 下冲杆, 下模冲 |
| | bottom quality | | | 船底质量(指船底的清洁程度) |
| | bottom radius | | | 槽底半径 |
| | bottom rake | | | 后角 |
| | bottom ramming machine | | | 炉底打结[捣筑]机 |
| | bottom ratchet wheel | | | (手制动)下棘轮 |
| | bottom reflector | | | 底部反射体 |
| | bottom roll assembly | | | 下轧辊组合部件 |
| | bottom roller | | | 底辊 |
| | bottom rot | | | 底腐病 |
| | bottom round | | | 底中圆腿肉 |
| | bottom row | | n. | 底端行 |
| | bottom sample | | | 底部试样 |
| | bottom sampler | | | 底质取样器 |
| | bottom sampling | | | 底质取样 |
| | bottom scanning sonar | | | 海底扫描声纳 |
| | bottom seam | | | 罐底的封边 |
| | bottom season | | | 底光 |
| | bottom seat | | | 折棚盖安装铁, 膨胀饼座 |
| | bottom sediment | | | 脚子 |
| | bottom segment | | | 底车砌块 |
| | bottom shell | | | 船底板 |
| | bottom shore | | | 底部支柱 |
| | bottom side | | | 底部 |
| | bottom side door | | | 下侧门 |
| | bottom side door hanger chain | | | 下侧门钩链 |
| | bottom sizing | | | 底胶料, 涂底 |
| | bottom slide drawing press | | | 下滑块式引伸压力机 |
| | bottom slide of saddle | | | (车床的)刀架底板 |
| | bottom soil | | | 底土 |
| | bottom spindle | | | 下(联)接轴 |
| | bottom sprag | | | 底部支撑 |
| | bottom squeeze | | | 底板隆起, 底鼓 |
| | bottom stiffener | | | 底部加强肋 |
| | bottom stowage | | | 压载, 压舱货物 |
| | bottom supporting drilling platform | | | 定柱沉垫式钻井平台 |
| | bottom surface | | | 底面 |
| | bottom suspension | | | 下支 |
| | bottom swage | | | 下陷型模 |
| | bottom swelling | | | 底涨力 |
| | bottom third wheel jewel | | | 秒针轮下钻 |
| | bottom tool | | | 下刀具 |
| | bottom transverse | | | 船底横向构件 |
| | bottom trawl | | | 水底拖网 |
| | bottom two way fired pit | | | 炉底双侧烧嘴(对嘴)均热炉 |
| | bottom unloader | | | 底部卸载机 |
| | bottom unloading of tank cars | | | 油槽车底部卸油 |
| | bottom up | | adv. | 颠倒,<俗>干杯！ |
| | bottom valve | | | 底阀 |
| | bottom vertical brace | | | 下竖撑, 底竖撑 |
| | bottom view | | | 底视图, 仰视图 |
| | bottom water sprays | | | 下喷水器(在被轧制带材的下面) |
| | bottom weather strip | | | 车窗下挡风胶垫 |
| | bottom well stripper | | | 底部圆筒汽提器 |
| | bottom wire | | | 下网 |
| | bottom yeast | | | 管底酵母 |
| | bottom-up method of designing webs | | | 自下至上Web设计法 |