Cov txheej txheem ntau lawm ntawm cov raj square yog yooj yim, kev ua haujlwm ntau lawm yog siab, ntau yam thiab specifications muaj ntau yam, thiab cov khoom sib txawv. Tom ntej no, peb yuav piav qhia qhov sib txawv tseem ceeb ntawm welded square tubes thiab seamless square tubes kom ntxaws. 1. Welded square pip...
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