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凹号
meaning in English
notch
Related Words
窝凹
成凹
凹坡
凹出
凹缝
凹光栅
凹创
凹切
凹域
凹坑
凹焊缝
凹焊缝 凹面焊 凹形焊缝 轻型焊
凹河岸
凹痕
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