Amaphampu Okushisa Okushisayo——Ingxenye 1
Amaphampu okushisa omhlaba (GHPs), kwesinye isikhathi abizwa ngokuthi ama-GeoExchange, amaphampu okushisa ahlanganisiwe emhlabeni, avela phansi, noma omthombo wamanzi, abelokhu esetshenziswa kusukela ngasekupheleni kwawo-1940s. Basebenzisa izinga lokushisa elingaguquki lomhlaba njengendawo yokushintshanisa esikhundleni...
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