The machine unit is made up of charging bucket, stepped gear, pulverizing knife, gear ring, pulverizing motor, discharging port, fan blade, aggregating box, dust collection box, etc.

该机由加料斗、分级轮、粉碎刀片、齿圈、粉碎电机、出料口、风叶、集料箱、吸尘箱等部分组成。

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Nadal did not let up in the second set, and perhaps even stepped up a gear.

BBC: Brutal Nadal sweeps aside Murray

But the French stepped up a gear as the first half moved into its closing stages.

BBC: Scotland 9-18 France

But although she managed to capture the opening set, Kuznetsova stepped up a gear to polish off the tie.

BBC: Russia cruise to Fed Cup defence