The backing plate shall be welded with matching electrodes so that the weld on the clad side is flush with the backing plate surface .

底板用配套焊条焊接，使复层侧的 焊缝与背衬板表面 齐 平。

Floor : Rigid building assembly that divides space horizontally into stories . It forms the bottom of a room . The backing plate shall be welded with matching electrodes so that the weld on the clad side is flush with the backing plate surface .

地板：刚性的建筑构件，将空间水平划分成楼层。地板构成房间的底部。底板用配套焊条焊接，使复层侧的 焊缝与背衬板表面 齐 平。