The block can be eliminated in the filter of magnesia fused mass at present because the filter orifice plate can be self-purified in use, accordingly the labor productivity is improved greatly.
过滤孔板在使用时能自净化，解决了目前镁熔体过滤中， 常易发生堵塞的问题，极大的提高劳动生产率。
However, any relationships among the unfused vertebral BMDs, the fused vertebral BMD, and the fusion mass BMD in a later phase after obtaining successful spinal union are unknown.
然而，还不知道非融合椎体骨密度、融合椎体骨密度、和成功进行脊柱融合后融合块骨密度之间的关系。
OBJECTIVE: We wanted to determine whether there are any relationships among the unfused vertebral BMDs, the fused vertebral BMD, and the fusion mass BMD after successful solid union.
目的：了解非融合椎体骨密度、融合椎体骨密度、成功坚强固定后融合块骨密度之间联系。
OBJECTIVE: We wanted to determine whether there are any relationships among the unfused vertebral BMDs, the fused vertebral BMD, and the fusion mass BMD after successful solid union.
目的：了解非融合椎体骨密度、融合椎体骨密度、成功坚强固定后融合块骨密度之间联系。
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