The rules that use the vocabulary item "122mm" are:
122mm howitzer
2s1 122mm howitzer
swa 122mm howitzer
swa 2s1 122mm howitzer
122mm howitzers
2s1 122mm howitzers
swa 122mm howitzers
swa 2s1 122mm howitzers
122mm howitzer
122mm howitzers
2s1 122mm howitzer
2s1 122mm howitzers
swa 122mm howitzer
swa 122mm howitzers
swa 2s1 122mm howitzer
swa 2s1 122mm howitzers