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Tube Kohua A179 A192
ASTM A179——–Paerewa o te Hapori Amerika mo te Whakamatau me nga Rawa
whakamahia mo te whakawhiti wera ngongo, condenser me nga taputapu kawe wera rite; Koeke Matua: A179
ASTM A192——- Paerewa o American Society mo Whakamātautau & Rauemi kei te whakamahia mō te pēhanga teitei min.Wall matotoru tuitui waro maitai Kohua me te Superheater ngongo; Koeke Matua:A192
