紧急放空人孔是快速泄压装置，其技术性能、主要零部件材料与HXF-HR呼吸人孔相同。
Emergency vent Manhole Cover is a kind of rapid relief-pressure device. Its technical performance, main material and main parts'materialare the same as HXF-HR type breather manholes.
对跨座式单轨交通轨道梁支座的主要构造形式、关键零部件的材料选用等进行了分析研究。
This article discusses the type of main construction and material selection of key parts on overseat, single-track beam support of traffic track.
用塑料制造汽车零部件是实现当前世界汽车材料的轻量化和环保化发展方向的主要手段。
Using plastics to make automotive parts is the main method to achieve the developing direction to lighten the weight of automotive parts without environmental pollution.
残缺信息的修复主要包括废旧零部件材料本体信息、材料赋予信息等信息的修复过程与方法；
The methods of repairing used parts'incomplete information contain two parts: technologies of acquiring used parts'information and technologies of retrieving the initial design information.
残缺信息的修复主要包括废旧零部件材料本体信息、材料赋予信息等信息的修复过程与方法；
The methods of repairing used parts'incomplete information contain two parts: technologies of acquiring used parts'information and technologies of retrieving the initial design information.
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