The influence of afterburning chamber length on secondary combustion efficiency and flow field were analyzed based on direct-connected ground simulation test.
The formation mechanism of orange valvule-like pinhole in rolled aluminium foil was investigated by using optical microscopy,scanning electron microscopy,and energy dispersion X-ray spectrum.
The compositional recipe of carburizer and the technical parameter of heat treatment are determined by means of the microstructrue analysis,peeling analysis.TEM observation and sawability test.
On the base of Elastic Mechanics, theory of offset error is founded through analyzing the main origin of error and its amenability in the course of experiment.
Based on the model test data and static analysis, two practical methods of determining the static character of the multichain mooring buoy system are given in this paper.
As an alternative to tuberculin skin test, there are also interferon gamma release assays or IGRAs which look for evidence in the blood of previous exposure to TB proteins.
Our first story the communist nation of North Korea has apparently carried out its first missile test since 2017 and analysts say it could also be a test of the United States.
化残渣采用热态、批量连续进料炼焦工艺的可行性。
燃烧效率的影响。
验
果都是阴性的。对此我确信自己是对的。
学人 Science and technology
人工智能驱动
验
来，朝鲜共和国进行的首次导弹
