bottomer井底把钓工
bottomn.底部;底端adj.底部的v.触底;打(基础)
bottom vertical brace下竖撑,底竖撑
bottom outlet orifice底部放水孔口
Bottom Vent Of Sleeve细侧
bottom hole separator井底油气分离器
bottom of sedimentary沉积层底部
bottomless dancers.裸体舞蹈者
bottom-hole pouring孔底灌浆
bottom ventilated bin底部通风粮箱
bottom-line setback基本挫折
bottom line of ethics伦理的底线