<prompt> Translate the following text to EnglishWakati kuna vitengo vingi vya ukarabati katika tovuti moja tu, kuhamasisha moja inahitajika kwa boilers zote, msimamizi mmoja tu wa ujenzi unahitajika, na vifaa hutumiwa kwa ufanisi zaidi.  <response>: When there are multiple units retrofit at one site only, one mobilization is needed for all of the boilers, only one construction supervisor is required, and equipment is more efficiently used. 