求翻译：将带有内包装的轴承产品装入箱内时，应先在箱内衬垫塑料袋或塑料薄膜；箱内如有空隙，需用瓦楞纸块、纸屑等干燥物质填满。是什么意思？

Bearings with an inner packaging products when mounted inside the box should be in the inside lining plastic bag or plastic film; if gap inside the box, drying substances such as stickers, fill up the required for the purposes of corrugated block.