What is the good blockboard?
These phenomena will weaken the overall bearing capacity of the plate, long-term uneven force will make the sheet structure distortion, deformation, affect the appearance and use of results.
decaying wood may exist in the eggs, the future prone to insects; look around with no glue, putty phenomenon, this phenomenon in general Is to make up for the internal cracks or holes
listen to the sound is very different, if the sound has changed, indicating the existence of hollow inside the plate.
