求翻译：12、看证件。一些重要部件，特别是总成类，比如化油器、分电器、发电机等，出厂时一般带有说明书、合格证，以指导用户安装、使用和维护，若无这些为假冒伪劣产品。是什么意思？

12, see the documents. Some important components, especially assembly class, such as carburetor, distributor, generator, etc., usually with the factory manual, certificate, to guide users to install, use and maintenance, the absence of such fake and shoddy products.

12, see documents. Some of the important components, in particular the total into categories, such as carburetors, electric generators, etc. , in general, the ex-factory, with a user manual, certificate in order to guide the user to install, use and maintain, in the absence of such a fake and inferi

12th, reads the credential.Some important parts, specially unit class, for instance carburetor, distributor, generator and so on, when exwork has the instruction booklet, the certificate generally, instructs the user installment, the use and the maintenance, if does not have these for the counterfei

12, see the documents. Some important parts, in particular the Assembly class, carburetor, Distributor, generator, the factory generally with brochures, certificates, to guide the user to install, use and maintain, in the absence of these fake and shoddy products.

12, see the documents. Some important parts, in particular the Assembly class, carburetor, Distributor, generator, the factory generally with brochures, certificates, to guide the user to install, use and maintain, in the absence of these fake and shoddy products.