Briquetting machine
Grinding mill Carbon Black Briquetting machine
Carbon black pellet Production Line stirs in the Binder mixer with catalyst firstly, then put the stirred catalyst and carbon black into Grinding mill for stirring and mixing. The mixed carbon black is conveyed through the conveyor belt to the Carbon Black Briquetting machine, pressed into globular.
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select yuanxi_id from student group by yuanxi_id having count(*) >= all(select count(*) from student group by yuanxi_id);
select yuanxi_name from yuanxi where id in(select yuanxi_id from student group by yuanxi_id having count(*) >= all(select count(*) from student group by yuanxi_id));
