Recent electronic means of pumping using low temperature sorption techniques and getter-ionpumps have been introduced.
现在已经采用了低温吸附技术和吸气离子泵的近代电子抽气设备。
2
If large facilities to ensure no oil, no oil pump need not choose ethnic groups, such as: water pump, molecular sieve adsorption pump, sputter ionpumps, heat pumps.