Selections from China Mainland Magazines, Supplement, 第 40-50 期 |
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第 1 到 3 筆結果,共 22 筆
第 27 頁
... silicon steel sheets through self - reliance and hard struggle . By simplifying the technological processes and raising the rate of turning out the finished product , we have reduced costs while achieving savings in the investment . Silicon ...
... silicon steel sheets through self - reliance and hard struggle . By simplifying the technological processes and raising the rate of turning out the finished product , we have reduced costs while achieving savings in the investment . Silicon ...
第 頁
... Silicon was discovered in 1824 by a Swedish chemist . Elementary silicon was later used as an alloying constituent to strengthen aluminum , magnesium , copper , and other metals , apart from having a deoxidizing effect on steel and ...
... Silicon was discovered in 1824 by a Swedish chemist . Elementary silicon was later used as an alloying constituent to strengthen aluminum , magnesium , copper , and other metals , apart from having a deoxidizing effect on steel and ...
第 頁
... silicon can be obtained by reducing potassium fluosilicate with metallic potassium at elevated temperatures , followed by washing out the resulting potassium fluoride with water . A somewhat more convenient method consists of the ...
... silicon can be obtained by reducing potassium fluosilicate with metallic potassium at elevated temperatures , followed by washing out the resulting potassium fluoride with water . A somewhat more convenient method consists of the ...
內容
Do Things in Accordance with Objective Laws | 6 |
The Petrochemical Industry | 13 |
Petroleum and Plastics | 19 |
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