The advance of internal PA engineering plastics is introduced through the product structure, application and technical development.
通过对国内聚酰胺工程塑料的产品结构、应用状况及技术开发动向的调查，介绍国内PA工程塑料进展。
The measures to improve the anti permeability in construction have been put forward from the perspectives of design, construction, raw materials, fine structure, application and maintenance.
从设计、施工、原材料、细部构造、使用维护等方面提出提高防水砼抗渗性能的措施。
Tank container belongs the most dangerous Class III pressure vessel and special requirements related to the structure, application and security have to be considered.
罐式集装箱属于最危险的第三类压力容器，因此在结构、使用和安全方面均有特殊的要求。
Tank container belongs the most dangerous Class III pressure vessel and special requirements related to the structure, application and security have to be considered.
罐式集装箱属于最危险的第三类压力容器，因此在结构、使用和安全方面均有特殊的要求。
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