The article introduces the technology of liquefiednitrogen freezing for the construction of the drain repairing of communication passage.
本文主要介绍了旁通道排水管修复液氮冻结加固施工技术,为今后类似排水管修复工程提供经验。
2
The avascular necrosis model was made on left femoral head by use of liquefiednitrogen. The expression of VEGF165 gene was examined by immunohistochemical method.
采用液氮冷冻法制作狗股骨头缺血坏死模型,将细胞骨材料复合物植入缺血坏死股骨头内。
3
Nitrogen is commercially produced by distillation of liquefied air.