自1995年第一次产生集体原子，“Bose - Einstein”冷凝物就成为普通的实验工具。
Since they were first made in 1995, Bose-Einstein condensates have become commonplace as experimental tools.
每周需用干燥的压缩空气或铜刷清理机台背部冷凝器一次以上。
A week with dry compressed air or a copper brush cleaning machine back condenser more than once.
水冷式冷凝器铜管易受水质不佳之影响，产生结垢，每年至少必须清洗一次。
The water cooling condenser copper pipe is susceptible to the effects of poor water quality, produce scaling, every year at least must be cleaned once.
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