... downdraft向下通风 downhill casting上铸法 dozer推土机 ...
基于58个网页-相关网页
... downhand welding 平焊 downhill casting 上铸 downhole 向下炮眼 ...
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... downhill transport 下向运输 downhill casting 顶浇,上注 downhill grade 下坡道 ...
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