1) in pairs; in couples
双双
3) Dual tower and dual column
双塔双柱
4) double-clip-double-nip
双浸双压
5) twin-arc twin-wire
双弧双丝
6) double chambers and double layers
双室双层
1.
This article presents the principle, configuration and characteristics of floating-bed ion exchanger with double chambers and double layers.
叙述了双室双层浮动床离子交换器的原理、结构及特点。
补充资料：双双
1.相并﹔成双。 2.一对对。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条