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Welcome to Roja Home of Technology RHT is a company that deals with technological issues. RHT is a company registered for the number ... inprogress. RHT headquarters in Dar es salaam and branches in Mwanza and Bukoba. RHT we receive work from anywhere in East Africa and we make sure you are get and receive back your work safe 100%. Our Services RHT is for you and we are waiting for you