It is the trademark of the original manufacturer, as the case may be. If it is sold as a new product with a large degree of renovation, it will be considered as a reengineering project and an infringement. If it's just maintenance, it's not infringement.

As a supplement to the market, second-hand machinery can connect the construction machinery and equipment market with the capital market, reduce the investment cost of construction units, shorten the payback period, improve the rate of return, and fully meet the needs of customers.