... plastic bottom paper 塑料贴面底层纸 Bottom Paper Weight 适用底纸克数 concrete leveling bottom paper 沥青原纸 ...
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A bagging experiment was conducted by using double paper bags, single paper bags (close and open of pocket bottom), plastic bags, and to not bagging as control.
采用双层袋、单层袋(下端封口和开口)、塑膜袋进行套袋处理，并以不套袋作为对照。
The lower layer is composed of a dry paper-pulp layer and a cloth-surface layer from top to bottom. The lower layer can be a plastic-paper layer.
下面层从上往下又由干纸浆层和布面层组成，下面层亦可是一塑料纸层。
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