书籍详情
格式
Kindle
页数
13
语言
英语
已发布
Feb 6, 2013
出版商
Bellwether Media
描述
Dump trucks help the other machines on a construction site by transporting dirt or other materials. Some dump trucks can carry a load of up to 52,000 pounds. Read about how these machines work and watch for when the truck dumps its load!