-baseboard;baseplate;footwall;{采矿}floor(位于矿脉下面的岩层,亦称“底帮”、“底盘”或“下盘”);chassisbase;flaskboard;header;{工}soleplate;solepiece;turningoverboard;{机}shoe;{电子}sole;{冶}bottomboard;backplane;backboard;backingsheet;bay;bedplate;bottomplating;housingshoe;ledger;mainbase;mat;negativematrix;panel;seating;subplate;supportplate;underplate