The difficulty ofdressing superhard wheel is one of the main obstruction to popularize application in industry.
超硬砂轮修整的困难，是生产上推广应用的主要障碍之一。
2
This paper reviews the applicationof chitin and its derivatives in medicine, including medical dressing, ophthalmic materials and pharmaceutical preparations.
本文综述了甲壳质及其衍生物在医药领域的应用，包括在医用敷料、眼科材料及药物制剂方面的应用。
3
Methods on the basis of animal experiment and clinical application, the former fixed appendix and dressing were replaced with elastic net and transparent gasbag.