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關注：1
2013-05-23 12:21
求翻譯：Conventional units have focal-spots larger than about 0.5 mm, minifocus units have focal-spots ranging from 50 microns to 500 microns (.050 mm to .5 mm), and是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
Conventional units have focal-spots larger than about 0.5 mm, minifocus units have focal-spots ranging from 50 microns to 500 microns (.050 mm to .5 mm), and
問題補充： |
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