Ukukhetha itanki yeoyile ye-oyile engaphezulu kwe-oyile
I-SF ephindwe kabini ngaphantsi komhlaba i-gonkr ye-frick inamandla okuxhathisa ubushushu obuphantsi kunye nefuthe, nkqu nakwindawo enobungozi, ayiyi kuphucula iqokobhe. Itanki yenzelwe ngombhobho we-vent, ububanzi be-50mm, i-vent ye-vent ye-vent ye-vent ye-vent kufuneka ifakwe kumsebenzi weflash, i-HNJS ye-MM ngaphezulu kwe-MM ye-MM HIT, i-MM HOORE NOVUZO NOKUVUNYELWA NGOKUFANELEKILEYO.
I-manhole isebenza kakuhle isebenzisa izinto ezifanayo kunye ne-sylinder yetanki yangaphandle, i-cylinder ubukhulu be-8 mm, xa i-MM isebenza ngokungaphantsi kwe-6 mm, kwaye kufuneka isebenzise amanyathelo aphezulu etanki, kwaye kufuneka asebenzise amanyathelo afanelekileyo e-anti-in anti. I-Manhole kufuneka isethwe ngodonga lwangaphakathi lweqokobhe elingaphakathi ne-Insun kunye nePlanethi iqhagamshelwe kwintsimbi yeflethi kunye nokufikelela kwinethiwekhi yesikhululo segesi
I-corrosion-itanki engaphantsi komhlaba engaphantsi komhlaba yexesha elide