Graders

A new road needs to be built, but first a grader must flatten the dirt underneath. A grader uses a blade to push the dirt down and prepare the way for a new road. Students will discover other jobs this powerful machine performs in this early introduction.

© 2020 Bellwether Media (ספר מוקלט): 9781618912046

תאריך פרסום

ספר מוקלט: 8 במאי 2020