vacuum pumping
... vacuum head 真空头; 吸入侧真空 vacuum pumping 真空泵; 真空抽气机 vacuum firing 真空烧成; 真空退火 ...
vacuum deaerator
... 真空稿图架 vacuum copyholder 真空抽气机 vacuum deaerator 真空距离 vacuum distance ...
vacuum group
high vacuum pump
vacuum pump compressor