Lightweightpaper coated on one side with transferable colouring agent for producing copies by impression on to an underlying sheet.
轻身的纸张，其中一央涂上可以转移的色剂，在压力下，它的色素转传下面的纸上，造成副本。
2
Kraft paper is wrapped and crumpled to fill empty space inside a package with light to medium weight, non-fragile items.
使用牛皮纸包装并使牛皮纸折皱，以填充轻到中等重量、非易碎物品的包裹内的空隙。
3
In this paper, the correction models of light, middle and heavy components ard sample weight, porosity and volume were established from the view point of influence mechanism.