In this paper,the ignition properties of black powder are researched with the low velocity detonation(LVD) center core ignition tube.是什么意思_In this paper,the ignition properties of black powder are researched with the low velocity detonation(LVD) center core ignition tube.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句