例文
- The PPMS is based on four parallel disk ion trap, a small ion getter pump and a micro-computer.
- This family of pumps are usually called'getter pumps'or'getters'and typically consist of metals which are reactive with the components of the residual gas which are not pumped by the TSP . By choosing a number of such sources, most constituents of the residual gas, except for the noble gases, can be targeted.
