对复杂模型机设计，做了精确的讲解和深入的设计，带有插图式的将设计步骤，让您很快快对设计复杂模型机了解透彻-Complex models machine design , made ​ ​ a precise explanation and in-depth design , with illustration style design steps , allowing you to quickly fast a thorough understanding of the design of complex models