| 摘要 |
A method of making an electrical heating unit which includes the steps of shaping a strip of electrical resistance wire into a pattern for the heating element of the unit, contacting one of the planar surface os the shaped strip against a masking member shaped in a pattern corresponding to that of the shaped strip, flowing an insulating and hardenable material over the remaining exposed part of the strip to encapsulate the exposed part and then hardening the material, and removing the masking from in contact with the strip to expose the unencapsulated surface of the strip.
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