WM-80
WM-80 is a multiple rocket launcher or artillery model.
Also recorded as WM-120.
In detail
It is associated with People's Republic of China.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“WM-80”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1337474: WM-80
Consult the source