Rooj vag ncaj: hom barrier railing ncaj, ncaj rail, feem ntau ntawm 4 mus rau 6 metres ntev, yog ntau.
Nkhaus bar barrier: tus barrier railing muaj 2 ntsia mus rau qhov zoo sib xws ntawm cheebtsam txhua yam, siab yooj ywm qws mechanism, tig tag nrho cov siv dov rau lawv tus kheej lubricated bearings los yog bearings, tsis puas, tsis muaj suab nrov.
Laj kab rooj vag: lub rooj vag nres qib zoo zoo nkauj heev, yog cov icing heev, tsis tua, nws kho kom haum, Court optimizing, tshwj xeeb tshaj yog rau kev loj hu nres tsheb yam lig, nres tsheb tswj lawv cov yuav txhawb tau kev siv ntawm cov rooj vag yog check dua, yooj ywm ntau thiab ruaj ntseg dua.