TY - BOOK AU - Jennings, Terry J. TI - Construction vehicles SN - 9780749680787 U1 - 624.1028 22 PY - 2008/// CY - London PB - Franklin Watts KW - Construction equipment KW - Juvenile literature N1 - Includes bibliographical references and index; Mighty machines -- Diggers and loaders -- Piledriving power! -- Cranes and pulleys -- Screws and augurs -- Pushing and shoving -- Paving and rolling N2 - By looking at machinery used in construction work readers learn how the various parts of the machines work. For example, it shows how cranes work on a pulley system, how the drum of a concrete mixer works on a screw thread and how weights are used in pile driving ER -