Lesson 4 Corrugated Fiberboard Boxes 第4课 瓦楞纸板箱 ⚫ Historical perspective ⚫ Corrugated Board ⚫ Properties and Tests ⚫ Corrugated Boxes ⚫ Carrier Rules ⚫ Stacking and CompressionLesson 4 Corrugated Fiberboard Boxes 第4课 瓦楞纸板箱 ⚫ Historical perspective ⚫ Corrugated Board ⚫ Properties and Tests ⚫ Corrugated Boxes ⚫ Carrier Rules ⚫ Stacking and Compression