在中国民间传统工艺中，烙画可谓是一枝独秀。
In Chinese folk traditional crafts, the pyrograph it is thriving.
工艺特点：污泥处理负荷高，出水指标高，不需要传统工艺中的二沉池等。
Crafts features: high sludge treatment burden, high outlet water standard, and no need of the Secondary sedimentation tank like the traditional crafts.
在传统工艺中，杯形薄壁内齿轮采用切削制齿与焊接工艺相结合的方式进行生产。
In traditional technology, cup-shaped thin-walled inner gear is produced by stamping two pieces of the part separately, and then welding together.
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