片语
filled rectangular steel tube矩形钢管
rectangular fin tube鳍片管
a rectangular-tube矩形管
rectangular finned tube方形翅片管
economizer rectangular fin tube省煤器鳍片管
rectangular aluminum tube矩形铝合金管
rectangular steel tube members矩形钢管
rectangular welded tube矩形焊管
rectangular test tube方形试管