| 摘要 |
A first layer of refractory paste (2) is placed in a suitable mould (1), and over this is placed a wire electrical resistance (3), the mould being then filled with a new layer (4) of refractory paste, the assembly pressed and subjected to a temp. of 1200 deg. C. - In a variant, the refractory paste is substituted by liquid refractory cement, in which case the resistance is held on removeable supports (14). The mould has projections (9) to form the radiation fins of the panel. |
