Design Secret- Discover how to Design Curling Iron
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This is a very usefull handbook to help you know more about the design secret of Hair Curling Iron! It only costs US$25.0, US$3.9 .
it covers the contents below:
- Types of curling iron
- Mechanical designing of spring-loaded handle & Marcel handle
- Desing configruation of heating element
- Design of temperature-control circuit
- Consideration of mould design
- Trouble shooting ...