Lub portal scaffold yog tus qauv steel yeeb nkab scaffold muaj li ntawm lub portal thav duab, hla kev txhawb nqa, txuas pas nrig, buckle scaffold board los yog kab rov tav thav duab, xauv caj npab, thiab lwm yam, thiab tom qab ntawd nruab nrog kab rov tav reinforcing pas nrig, cross bracing, cheb pas nrig, sealing pas nrig, bracket thiab base, thiab c...
Nyeem ntxiv