bottom on建立在
bottomn.底部;底端adj.底部的v.触底;打(基础)
Bottom Water Oil Deposit底水油藏
bottom half outer casing外下汽缸
bottom stitching machine封底钉铆机
bottom ring gas-supply底环补气
bottom frame-shear wall底部框架抗震墙
bottom of conduction band导带底
bottom-cooled technique底部冷却技术
bottom door winding shaft底门卷链轴
bottom mounted breakwater混合式防波堤
bottom out bottom upwards倒置, 反转