Steel Stairacase o se tasi o vaega taua e pei o le apefai avanoa i scaffolding ， e masani ona faʻaaogaina i faiga faʻalava eseese.
Hunan World o lo'o tu'uina atu fa'asitepu u'amea maualuga mo fa'aoga fa'aoga, fa'amatalaga o lo'o fa'aalia i lalo:
O fa'asitepu e 43mm lapopo'a lapo'a e masani lava ona fa'aoga fa'avaa fa'avaa, ae fa'atasi ai ma lapo'a 50mm lapopo'a fa'amau e masani lava mo isi fa'aoga fa'aoga.
Taimi meli: Feb-19-2021