preconcentrate 中文意思是什麼
preconcentrate
解釋
初選精礦-
The energy content of the preconcentrate of the example could be increased by the addition of other explosives such as trinitrotoluol.
加入其它炸藥，例如三硝基甲苯，可使所列舉的預濃縮物的能量增加。
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