musicologist
发表于 2025-3-23 13:04:37
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未开化
发表于 2025-3-23 17:31:45
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Inexorable
发表于 2025-3-23 21:03:54
Phases and Phase Transformation in Iron-Carbon System,The iron-carbon system has received much detailed study because of its great importance in engineering. Many properties of cast irons and plain carbon steels, as well as their microstructures can be explained on the basis of the phase diagram of this system.
NAG
发表于 2025-3-23 23:23:11
Metals and Alloys,erties, are the principal attributes of metals. Broadly, metallic materials, may be divided into two large groups—fertous and non-ferrous, depending on whether the materials have iron or some other element as the principal constituent. Ferrous materials can be further grouped into wrought irons, cas
构成
发表于 2025-3-24 05:03:08
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灌输
发表于 2025-3-24 08:56:36
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商业上
发表于 2025-3-24 12:35:33
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senile-dementia
发表于 2025-3-24 17:18:21
Composite Materials,r of the materials alone. Using this principle, clay bricks were strengthened with straw just as today plastics are strengthened by reinforcement with fibres. Nature also creates many materials that are a natural composite. Wood, for example, is a composite material consisting of cellulose fibres embedded in a matrix of lignin.
Meager
发表于 2025-3-24 22:14:09
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垄断
发表于 2025-3-25 02:04:18
Polymeric Materials,ations of functionality and polymer formation. Rapid progress in polymer science has continued ever since. In the few decades following 1930 there has been a tremendous development of chemical industries devoted exclusively to production and processing of polymeric compounds, the number and volume of which are constantly increasing.