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设备一级保养
avia.
level I maintenance of equipment
(即设备日常保养,由操作者每天对设备做日常性保养,主要是清洁加油等)
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
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The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
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