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开机自动排气功能。
Boot automatically exhaust function.
youdao
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发动机排气引射自动除尘，利于保养；
The design for automatic dust removal of engine exhaust is good for maintenance;
youdao
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发动机排气引射自动除尘，利于保养；
The design for automatic dust removal of engine exhaust is good for maintenance;
youdao