A vacuum degasifier is used where all gases, including oxygen, need to be removed from the water for high purity or corrosion protection purposes.
真空脱气机用于分离水中各种气体包括氧气至高纯度的应用中，或用于腐蚀保护目的。
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The composition of special-purpose degasifier for cleaning aluminium alloy is formed from fluorite, active carbon, calcium carbonate and potassium carbonate.