农户新买的拖拉机，常常出现一些意想不到或大或小的故障和损坏。由于农户不了解农机具的三包程序和手续，不注意“二包”的有关规定，往往给自己造成不必要的经济损失。农户购买农机具时应注意如下几点：第一，首先要向厂家或销售单位索取购机的正式发票和车辆保修卡。发... New tractors bought by farmers often show unexpected or large or small faults and damages. Because farmers do not understand the three packages of farm machinery and procedures, do not pay attention to the “two packages” of the relevant provisions, often give themselves unnecessary economic losses. Farm households should pay attention to the following points: First, first of all to the manufacturer or sales unit for the purchase of the official invoice and vehicle warranty card. hair...