3 adjustng the level of the floor by laser apparatus 3采用激光扫平仪进行调节地板水平
2.
The surface layer should have exact strength and height and the quality of the surface needs to accord to the current standard and relative principles . 3 . using level ruler of 2 m test the level of the flooring 如果现场勘测计算出最后一块地板的宽度不足50mm ,应在预铺装第一排地板时,在地板的宽度上截去一部分,保证最后一块地板的宽度大于50mm 。