... bark picture树皮画 bark press树皮压榨机 bark scraper刮树皮器 ...
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... barium 钡 bark press 压皮机 bark 茎皮 ...
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... 树皮碎裂机 bark breaker 树皮粉碎机 bark mill 压树皮机 bark press ...
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screw press for dehydrating bark 螺旋式树皮压榨机
scroll press for dehydrating bark 螺旋式树皮压榨机
·2,447,543篇论文数据，部分数据来源于NoteExpress
While written manuscripts were used for teaching in medieval times, they were written on birch bark or palm leaves, until the advent of the printing press from the 16th century.
写下的手稿在中世纪被用来教学，写在白桦树皮和棕榈叶上，直到16世纪出现印刷机为止。
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