air extraction piping 抽空气管道
air extraction main 抽气总管 ; 抽气总管道
air extraction system 抽空气系统
CAX Compartment Air Extraction 抽风舱
gap suitable for air extraction 抽风间隙
air extraction plant 抽气装置 ; 抽气设备
air-extraction 气提法
Open air extraction 开式抽气
An air extraction hood must be switched on during operation of the gas cooktop.
一个抽气罩必须开启燃气灶具期间的操作。
Rapid temperature falling, rapid frosting and strong air extraction capability for the vapor.
降温迅速，快速结霜，对水蒸气有强大的抽气能力；
The invention relates to a vacuum packer, especially a vacuum chamber, working flat board and sealing air extraction device.
本发明涉及真空包装机，特别涉及一种真空包装机的真空工作室、工作平板及密封抽气装置。
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