bottomryn.船舶抵押契约;冒险贷借
bottomn.底部;底端adj.底部的v.触底;打(基础)
bottom water drive底水驱动
bottom header pipe闸首底部放水管
bottom up analysis自底向上分析
bottom - blowing底吹
bottom compartment底室
bottom-up parser自底向上剖析程序
bottom/top gear最低/最高挡
bottom sector gate底部扇形闸门
bottom of pin hole枢孔底
bottom dumping car底卸式料斗车,底卸式车