But gas bubbles in the platinum had led Edison to develop an efficient vacuumpump to remove the air from the inside of his bulbs.
但铂材料中的气泡启发了爱迪生，他开发出一种高效率的真空泵来抽取灯泡里的空气。
2
Inside the cabinet are an air compressor and a vacuumpump.
盒子内部是一台空气压缩机和一台真空泵。
3
Through tests and exploration, the cause of vacuum fluctuation in summer was found, in the direct air cooling unit, the output of vacuumpump had obvious influence on the variation of vacuum.