再生革
再生革是用皮革的下脚料、废弃料进行加工,剥离成纤维,然后加入粘合剂和有关配合剂,经过制浆、成形、干燥等工序压制而成。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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