The method of the invention is that: inert fillers without the influence on the reaction are arranged at the bottom parts of each catalyst bed layer of a reactor.

本发明方法为：在反应器每个催化剂床层的底部装入对反应没有影响的惰性填料。

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Their Helicon Double Layer Thruster uses radio waves to ionise one of the inert, or noble gases - a group which includes krypton, xenon and argon.

BBC: Glow from argon plasma. Image: LPTP, Ecole Polytechnique