Every time an instructor at the National Chimney Sweep Training School demonstrates the “thermal shock” that occurs during a chimney flue fire, the outcome is different! In this video we took… | Views: 0 0 ratings | |
| Time: 02:23 | More in Education |
from masonry http://ift.tt/1HIo2mY via Masonry News and Information
Masonry News and Information
from Tumblr http://ift.tt/18YH1hV