... galvanized iron pipe 镀锌铁管 ; 白铁管 Galvanized Welded Pipe 镀锌焊管 Galvanized gas pipe 镀锌煤气管 ; 镀锌瓦斯嗓 ...
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... 石油钻探杆 drill pipe for oil field; galvanized welded pipe 探杆测量 measurement by sound 探杆配置 probe arrangement ...
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