 ER50 ER70 usoro bụ kpọmkwem eme nke abụọ-larịị regulator, ọtụtụ-eji maka nnyefe na nkesa nke ọdịdị gas, mmanụ petrol gasị ma ọ bụ ndị ọzọ na-abụghị corrosive gas maka ulo oru ọrụ na residential users. 