The central cleaning device makes the powder ascending rate higher, as the diversion conductor and pole needle do not accumulate powder.
中央清理气的设计，使导流体和极针不再积粉，提高了上粉率。
The central cleaning device makes the powder ascending rate higher, as the diversion conductor and pole needle do not accumulate powder.
中央清理气的设计，使导流体和极针不再积粉，提高了上粉率。
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