Hauv kev tsim kho thiab kho dua tshiab, kev nyab xeeb thiab kev ruaj ntseg yog qhov tseem ceeb. Ib qho ntawm cov cuab yeej tseem ceeb los xyuas kom meej cov yam ntxwv no yog scaffolding steel struts, tseem hu ua braces lossis struts yooj yim. Hauv phau ntawv qhia tseem ceeb no, peb yuav tshawb txog dab tsi scaffolding steel struts yog, ...
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