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H finned tube
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H finned tube
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H finned tube
H型鳍片管
把两片中间有圆弧的钢片对称地与光管焊接在一起制作而成的管子。其正面形状很像字母“H”,因而得名。又称H型肋片管、蝶片管。
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Portrait of Cao Xueqin
Portrait of Erasmus
portrait of Guanyin in bluish-white ceramic
Portrait of mother
Portrait of Qi Baishi
Portrait of Queen Tiy with a Crown of Two Feathers
Portrait of the Days of Youth
portrait of the goddess and the lady of the Xiang
portrait of the King Miaozhuang of the Sansheng Opera Troupe in Xihe County
Portrait of Yang Zhuxi
Portrait of Yang Zhuxi by Wang Yi
Portrait of YouSong by Du Qiong
Portrait of Zhang Qingzi
Portrait Painting
portrait shop
Portraits of Four Heavenly Kings
Portraits of Periodical Offering
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port safety
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Port Shed and Storage Yard
Portsmouth
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