Is that what these are? [Grad missile launchers]
<http://www.fortmilltimes.com/106/v-story_images/story/248971.html>
.................
>From the configuration of the truck/base, those appear to be RM-70/85
units -- a Czech variant of the Soviet design.
You can see all the major versions here -
<http://en.wikipedia.org/wiki/9K51_Grad>
.d.