卡钟安装完以后没有盖上面板的原因是我们安装完通知工程部门，他们没有及时安装。
The time clock was left uncovered is because the workers of Engineering Department didn't install the panel in time, even though we informed them that we had finished the mounting work already.
卡钟安装完以后没有盖上面板的原因是我们安装完通知工程部门，他们没有及时安装。
The time clock was left uncovered is because the workers of Engineering Department didn't install the panel in time, even though we informed them that we had finished the mounting work already.
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