adj. twin-stage
双级泵 double-stage pump
双级凸轮 Cam of double lift ; double lift profile cam
双级主减速器 double reduction final drive
双级压气机 two stage compressor
双级压缩 [制冷] compound compression ; two-stage compression
双级继电器 two-stage relay ; two step relay
双级节流制冷器 [制冷] compound throttling refrigerator
双级减速 double reduction
双级压缩机 [制冷] compound compressor ; double-stage
注：双级减速比由两单级速比组合而成，上表中未列出的亦可生产。
Note: The double step reducing ratio consists of the both mono-step reducing ratio. The unlisted on the above table also can be produced.
服务器诊所经常提倡“双级”编程-组合两种不同语言-来利用各自的长处。
Server clinic often advocates "dual-level" programming — combination of a couple of different languages — to exploit the strengths of each.
这种双级架构双层用户群（教堂形而上，市集形而下）的模式也被其他软件采用。
There have been other software products with a two-level architecture and a two-tier user community that combined a cathedral-mode core and a bazaar-mode toolbox.
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