ETT Subway / tunnel fibre sima icyuma

Ibisobanuro bigufi:

Isahani ya Kalisiyumu ni kimwe mu byuma bya calcium ya calcium, hamwe nubutaka bwinshi bwa calcium silicatike yububiko hejuru yuburyo bwa chimique, cyangwa enamel organique bizaba ari ikirere cyinshi cya fluorocarbon aluminium zinc icyuma hamwe nibihuza byazo, byongerwaho nubushyuhe bwinshi nigitutu, uburyo bwo gukiza umuvuduko uhoraho, kandi inyuma hamwe nigitambaro cya aluminiyumu. Icyuma cya calcium plaque yubatswe idasanzwe, yabonye patenti nyinshi zigihugu, ni ubwoko bwo kurengera ibidukikije, kuzigama ingufu ibikoresho bishya, bikoreshwa cyane muri tunnel, metero, ikibuga cyindege nibindi bikoresho byo gutwara abantu munsi yubutaka kurinda umuriro no kurinda igihugu.