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清洁、沟 以上为机器翻译结果，快速获取精准的人工翻译结果，建议选择有道人工翻译 - 1
C,. Incomplete fusion prevent adopting greater welding current, use correctly to weld the cleaning of operating, notice groove position. 未熔合的防止采用较大的焊接电流，正确地进行施焊操作，注意坡口部位的清洁。 - 2
Groove preparation, cleaning before welding and butt welding construction of ther tower were showed. - 3
Clean sand by blade away, finally from rotating impeller into sand discharge groove, complete sand cleaning effect. 干净的砂石由叶片带走，最后砂石从旋转的叶轮倒入出料槽，完成砂石的清洗作用。
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