一看有无产品合格证。合格产品,均有国家质量技术监督部门鉴定合格后,准予生产出厂的检验合格证、说明书以及安装注意事项。如果没有产品合格证,多为假冒伪劣产品。二看规格型号。选购农机配件时,要观察配件的规格型号是否符合使用要求。有些从外观看相差无几,但稍有疏忽,买回去的产品也许就不能用。三看有无装配记号。合格产品装配标记都非常清楚、明显。如齿轮装配记号、活塞顶部标记等应完好清晰。没有 A look at the product certification. Qualified products, both national quality and technical supervision department after the identification of qualified, to allow the production of the factory inspection certificate, instructions and installation precautions. If there is no product certification, mostly fake and shoddy products. Second look at the specification model. When purchasing agricultural machinery parts, we must observe the specifications of the models are used to meet the requirements. Some look almost the same from the outside, but a slight negligence, buy back the product may not be used. Three to see whether the assembly mark. Qualified product assembly marks are very clear and obvious. Such as gear assembly symbols, piston top markings should be intact and clear. No