Home
Download PDF
Order CD-ROM
Order in Print
Home
>
Cold Research and Engineering Laboratory Reports
>
> Figure 4. Distribution of permafrost and seasonally frozen ground in the Northern Hemisphere
Figure 3. Ripper attachment for use on moldboards of dozers
EXCAVATING HARD AND FROZEN GROUND
SR97_14
Page Navigation
1
2
3
4
5
6
7
8
9
4