Original sentence: M106 has a water vapor maser that is seen by the 22GHz line of ortho-H2O that evidences dense and warm molecular gas.Spiral Galaxy M106 @ SEDS Messier pages
Edited sentence: M106 has a water vapor maser that is seen by the 22-GHz line of ortho-H2O that evidences dense and warm molecular gas.Spiral Galaxy M106 at SEDS Messier pages