假底 meaning in English

false bottome
false floor

Barrois touched a spring , the false bottom came out , and they saw a bundle of papers tied with a black string
巴罗斯在一暗扭上按动了一下，抽屉的假底脱落了下来，他们见到里面有一卷用黑线缠着的文件。
Model xjq has following features ：（ 1 ） dummy bottom is adopted , making the recycling capacity of the recycling cylinder is 2 . 5times of the tand . ( 2 ) the stator is a cylinder in structure with its inner wall being vertically ribbed , and slots are placed , leading to better cutting lffect to the slurry . ( 3 ) due to low immerging depth of the rotator , low rurning speed of the impeller , and wide space between the impeller and stator , wearing is low and power consumption greatly reduced . ( 4 ) it is spontaneously aerated
Xjq型浮选机为仿维姆科型，该机主要有以下几个特点：（ 1 ）采用了假底，循环简可使循环量达到槽容积的2 . 5倍; ( 2 )定子结构为圆筒型,内壁设有立筋条和长孔,对矿浆的前切作用好; ( 3 )转子浸没深度浅,叶轮转速低,叶轮和定子间隙大,所以其磨损轻,动力消耗大大减少; ( 4 )可自吸空气。