Cov raj dej Pipeline yog los muab cov pa roj pneumatic}}} Cov yeeb nkab roj loj yog ua los ntawm galvanized yeeb .

Pneumatic Teeb Liab Pipeline yog qhov kis cov pneumatic cov paib, feem ntau nrog cov yeeb nkab hlau, tooj liab lossis nylon yeeb nkab .

