Q1: He aha te rererere valve?A: Ko te rewharewha he paera e whakamahia ana hei whakatika i te rere o te wai me te pehanga, ko ona ahuatanga matua he iti te rahi, he maamaa te taumaha, he hanga ngawari, he pai te mahi hiri.Kei te whakamahia nuitia nga Waahanga Panui Hiko mo te maimoatanga wai, petrochemical, metallurgy, pow hiko...
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