be having a BOD less than 150 mg/l be free from suspended solids be free from floating impurities not be very hot
Answer Discuss in Comment
"Scientists dream about doing great things. Engineers do them."
PSC Advertisement ⏩ | Federal PSC | Bagmati PSC | PSC Karnali | PSC Lumbini | PSC Sudurpaschim | PSC Gandaki | PSC State 1.