Bell Hammer Seven uses a chlorine additive, but what about the environmental impact of chlorine gas? Also, what about the effects on metals (especially tightening of sleeves and piston rings) due to long-term use?

Currently, chlorine (alkanthus chloro) is controlled by CAS number, and we are using an environmentally friendly type as a controlled substance.
In addition, the airtightness of the sleeve and piston ring is good, friction is eliminated, and a good situation can be produced.