尼日利亚采购需求：bajaj、电动三轮自行车、电动送货三轮车、踏板助力电动三轮车、电动车、胖轮三轮车

I'm looking for a robust vehicle that can operate efficiently on the rough terrains of Nigeria, specifically designed for milk collection and aggregation at the cluster level. The ideal model would either be petrol/diesel or solar-powered, but must include a solar-powered cooling unit to ensure the milk remains fresh during transportation. The vehicle needs to be durable and reliable, given the challenging road conditions. It's essential that the cooling system effectively maintains the quality of the milk while on the move. Please provide details on your available models that meet these criteria, including their specifications and any features that enhance performance in rugged environments. Looking forward to your prompt reply!