持续低负压吸引
sustained suction with micro negative pressure
抽力(负压)
characteristics of the journal
低负压吸引
low negative pressure suctionlung
电动负压吸引刮刀
Dynamo-electric shaver technique
封闭式负压吸引技术
Closed negative pressur e sucking technique
负压波动
vacuum pressure fluctuation
负压波法
negative pressure wave law