Imvelaphi Nokuba ngumgca wetrunk okanye uthungelwano lwengingqi yemetropolitan, imithombo yomngxuma umbhobho ongaphantsi komhlaba zixinene kakhulu. Xa kuthelekiswa neentambo eziqhelekileyo, ukusetyenziswa kweentambo ezincinci ezivuthelwa ngumoya kunokonga phantse 50% yobutyebi kwimingxuma yemibhobho. Isakhiwo esiqhelekileyo senkqubo ye-micro-cable evuthelwa ngumoya ngumbhobho-micro-pipe-micro-cable. Umbhobho ongumama unokufakwa kumngxuma wombhobho wesamente, kunye nokwakhiwa kwendlela entsha nako kunokwenziwa. Kwi-HDPE esele ibekiwe okanye ityhubhu yomzali yePVC, okanye ubeke ngaphambili ityhubhu yomzali kunye ne-micro-tube kwindlela entsha yokwakhiwa kwentambo yentambo, ingavuthelwa ngombhobho okanye ivuthelwe...