Umuyoboro wa tunnel
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Umuyoboro wa tunnel
Umuyoboro wa tunnel nubwoko bwubwoko bwahujwe, bihuza imiterere yurukuta rwibanze hamwe nimikorere yo mumwanya hasi hashingiwe kubwubatsi bunini, kugirango dushyigikire imiterere rimwe, tumwe Icyuma kimwe, hanyuma usuke urukuta nibikorwa muri icyarimwe. Kubera imiterere yinyongera yiyi mirimo ni nkumuyoboro wurukiramende, yitwa umuyoboro wa tunnel.