vacuum bulb的意思|示意
真空灯泡
vacuum bulb相关短语
1、 vacuum incandescent bulb 真空白炽灯泡
2、 lamp bulb vacuum pump 灯泡真空抽气泵
3、 vacuum m incandescent bulb 真空白炽灯泡
vacuum bulb相关例句
Through a carbonized cotton thread in a vacuum glass bulb. His invention proved that.
一个真空玻璃灯泡中的碳化棉线。他的这项发明证明。