85914941___Side_Effect
[Disinfection methods] Cl2 [Effect] Better [Harm of Excess to Body] Big Yes [The Extent of Convenience] Chang the gas at fixed period [Side Effect] 
Big(danger in operation)
N o
B i g ( d a n g e r i n o p e r a t i o n )
L i t t l e
A l i t t l e
Side Effect