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关注：1
2013-05-23 12:21
求翻译：用PH试纸检测并记录测试值，每20-30分钟检测一次直至PH值与上次一样，则酸洗完成是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
用PH试纸检测并记录测试值，每20-30分钟检测一次直至PH值与上次一样，则酸洗完成
问题补充： |
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2013-05-23 12:21:38
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2013-05-23 12:23:18
Use PH test strips test and record test values for every 20-30 minutes detected once until the PH value of the last time the same, then the complete Pickling
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2013-05-23 12:24:58
Examines and records the test value with the PH indicator paper, until every 20-30 minute examines one time the PH value with the previous dissimilarity, then the acid pickling completes
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2013-05-23 12:26:38
Use PH test strips to measure and document the test value, every 20-30 minutes testing until the PH value, like last time, acid finish
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2013-05-23 12:28:18
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