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关注：1
2013-05-23 12:21
求翻译：1. 在安装砂轮前，观察砂轮是否有裂纹，是否破碎。并且作一个敲击测试（砂轮完好时，声音响亮）。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
1. 在安装砂轮前，观察砂轮是否有裂纹，是否破碎。并且作一个敲击测试（砂轮完好时，声音响亮）。
问题补充： |
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2013-05-23 12:21:38
1 before installing the wheel, observation wheel for cracks, is broken. And as a percussion test (wheel well, the sound loud).
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2013-05-23 12:23:18
. * 1 wheel before the installation, whether or not the grinding wheel with cracks, whether it is broken. and to be a percussion test (grinding wheel is intact, when loud).
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2013-05-23 12:24:58
1. In installs in front of the grinding wheel, observes the grinding wheel whether has the crack, whether stave.When makes a rap test (complete grinding wheel, sound resounding).
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2013-05-23 12:26:38
1. before the installation of grinding wheel, observation wheel are there cracks, broken. And as a hit test (when wheel intact, sound louder).
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2013-05-23 12:28:18
We keep the city clean is paramount
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