In order to reduce weight, holes can be drilled onto the PE boards which will have some effect.The holes should be drilled systematically and the size slightly bigger.
In order to reduce the weight, may consider that drills on the PE board, may play some roles. Orderly punch, Kong Dada some. thequestion supplemented: The orderly punch, the hole hits big somewhat, these words must with the principal clause fuse in together.
