ball-passing test 中文意思是什麼
ball-passing test
解釋
通球試驗-
The foretime testing method, down - passing the release unit for releasing " the tiny ball " and then taking out the unit for filling isotope has increased intension and fee of test
過去採用的先下井釋放「冷球」 、再取出釋放器裝入同位素進行二次下井的測試方法增加了測試強度和費用。
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