How did they make that. Part 3 /

This video discusses how slate is a valued roofing material for houses due to its durability. It also shows the step-by-step processes used by the British mining industry to mine and prepare the slate boulders for use as roofing material.

Bibliographic Details

Corporate Author:	Alexander Street (Firm)
Format:	Video
Language:	English
Language Notes:	In English.
Published:	New York, NY : Big Media, 2010.
Subjects:	Manufactures. Manufacturing industries. Manufacturing processes. Documentary television programs.
Online Access:	Connect to this streaming video (Alexander Street Press)