| 摘要 |
Operation of a hot water heating unit using a solid material which gradually dissolves on contact with water where an element (11) made from the solid material is located in the region of a valve seat (24). Independent claims are included for: (1) a hot water heating unit arrangement as described above; (2) an element for decreasing corrosion of the unit, i.e. an anticorosive solid which gradually dissolves on contact with water. |
