一、目的：FD－4A是西南医疗器械厂生产的牙科高速涡轮机，其手机是日本生产，价格太贵，一般寿命在6个月一门个月。是国产手机的3倍（23％）以上，基层医院由一）收费状况，考虑更换。二、选型：从国产涡轮机与之接近的为北京生产的＊K－4型所配手机，主要是接日润滑不同。三 I. Purpose: FD-4A is a dental high-speed turbine manufactured by Southwest Medical Instrument Factory. Its mobile phone is manufactured in Japan. The price is too high, and its general life span is six months and one month. More than three times (23%) of domestic mobile phones, primary hospitals are subject to a charge condition and are considering replacement. Second, the selection: from the domestic turbine is close to Beijing’s production of * K-4 type equipped with mobile phones, mainly different from the date of lubrication. three