Some floors sold Kei Hau-off, the first size varies in width, particularly neighbouring two pieces board thickness combinations too poor to install after a bending, deformation, ground-formation, etc.

• 有的地板榫头企口不含缝，大小头宽窄不一，特别是相邻两块板拼接厚度差太大，安装后就出现弯曲、变形、地面不平整等等。