As the Erie Canal was losing business, some of its levees began to break.
由于伊利运河逐渐失去生意，有些防洪大堤开始破裂。
Methods:Two kinds of pile nuclear crown prosthesis were made and the break of pile nuclear and root canal, the fall off of the pile and cervical margin were compared.
方法分别制作两种桩核冠修复体比较其桩核折断、根管折断、桩松动脱落、颈缘等情况。
Methods:Two kinds of pile nuclear crown prosthesis were made and the break of pile nuclear and root canal, the fall off of the pile and cervical margin were compared.
方法分别制作两种桩核冠修复体比较其桩核折断、根管折断、桩松动脱落、颈缘等情况。
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