Ply change is big, board face has bongo package, water proofing property of demonstrative board face is poor.

厚度变化大，板面有小鼓包，说明板面防水性差。

youdao

Ply change is big, board face has bongo package, water proofing property of demonstrative board face is poor.

厚度变化大，板面有小鼓包，说明板面防水性差。

youdao