Secrets of Construction Machinery Proposal Service

Akio is an elementary school student who loves working cars. When the reconstruction work of the gymnasium has begun and I am excited to see many working cars, the robot Tio of the future appears, and in fact there are working cars = construction machines that are being rented (rental) ). What's more, they don't just rent machines, they also rent them according to customers and make new construction machines! Let's learn about secrets in this book!