@sarz_adhesive: Styrofoam can rapidly expand and fill space in a short time, but the hardness of styrofoam is not uniform and will change with the increase of grade, do you remember?发泡胶能够在短时间内迅速膨胀填充空间,但是发泡胶的硬度不是统一的,会随着等级增加而改变,你记住了吗?#发泡胶 #胶 #glue #adhesive #聚氨酯发泡剂