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Late recurrence of papillary thyroid cancer from needle tract implantation after core needle biopsy:
BACKGROUND Papillary thyroid cancer(PTC)has good prognosis so that the local recurrence or distant metastasis can occur ......
光纤光栅具有插入损耗小，波长选择性好，易于调谐，使用灵活等优点，成为光纤激光器首选谐振器件。为了适应高功率光纤激光器的发展需求，在......
