摘要:WeldingWelding is a fabrication or sculptural process that joins materials, usually metals or thermop[阅读全文:]
摘要:Antimony (pronounced /æntɪmənɪ/ (UK) or /æntɨmoʊni/ (US)) is a c[阅读全文:]
摘要:Civil engineeringCivil engineering is a professional engineering discipline that deals with the desig[阅读全文:]
摘要:T-beamA T-beam, used in construction, is a load-bearing structure of reinforced concrete, wood or met[阅读全文:]
摘要:I-beams (also known as H-beams, W-beams (for "wide flange"), rolled steel joist (RSJ), or double-T[阅读全文:]
摘要:Boron (pronounced /bɔrɒn/) is the chemical element with atomic number 5 and the chemical sy[阅读全文:]
摘要:Cobalt (pronounced /koʊbɔːlt/) is a hard, lustrous, grey metal, a chemical element wit[阅读全文:]
摘要:Magnesium (pronounced /mæɡniːziəm/) is a chemical element with the symbol Mg, atomic[阅读全文:]
摘要:Direct-reduced iron (DRI), also called sponge iron, is produced from direct reduction of iron ore (in[阅读全文:]