This page is still under construction. Please call again soon. Cromwell, Central Otago. Just how or why the five of David and Elizabeth's family came to ...
Making North America eduor materials are available on PBS LearningMedia. Explore our collection of Earth science video resources, background essays ...
SBB's steel glossary is great for finding the definition for any steel term associated to the industry.
A. Abutment In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments ...