Does anyone know the names of the various parts of the protractor?

Multi-functional protractor function: it can draw angles, measure angles, draw vertical lines, parallel lines, measure inclination, verticality and horizontality at will. It can be used as an internal and external right-angle ruler. It can be opened and closed. The long and short rulers can also be read more accurately and intuitively, and a circle of specified size can be drawn. The product can be made into three types: A-type small stationery (mainly made of plastic) suitable for primary, secondary school students; type B teaching aids (mainly made of plastic) suitable for school teachers; type C tools (mainly made of stainless steel) suitable for factories, Workshops, carpenters, mechanics, repairmen, etc. For example, teachers, primary, secondary, and secondary school students doing mathematics, geometry, and small manufacturing or repairmen need to carry protractors, set squares, rulers, compasses, and workers’ levels, rulers, measuring tables, and other measuring tools when measuring, drawing, and manufacturing. In order to make up for the singleness of use of the above measuring tools and the inconvenience of carrying, storing and using. This product has a simple structure, novel and unique shape, reasonable design, is very flexible in use, and has comprehensive practical value. It can achieve multiple uses in one device, thereby improving work efficiency.

Investment benefits and social benefits: According to the product introduction, the manufacturing materials are widely sourced, low cost, simple structure, easy to manufacture, highly practical, large in application market, and have great investment benefits for manufacturers.

In order to make up for the singleness of use of some measuring tools and the inconvenience of carrying and keeping, this product has a simple structure, novel and unique shape, reasonable design, flexibility and comprehensive practicality. Value, realizing one device with multiple uses, thus improving work efficiency and reflecting social benefits.

Market analysis: The country has a population of 1.3 billion. Taking a province with a medium population as an example, the population is 40 million. Calculated based on 20% of primary, secondary, and university students, there are at least 8 million students, and based on 5% of the purchase volume (A-type stationery multifunctional protractor) calculation, that is 400,000 pieces, calculated based on the reference unit price of 5-10 yuan per piece, the output value is between 2-4 million yuan. The sales of B-type teaching aids are estimated at 20,000 pieces, with a unit price of 30-50 yuan, and the output value is between 600,000 and 1 million yuan. The sales of C-type tools are estimated at 20,000 pieces, with a unit price of more than 60-100 yuan, and the output value is more than 1.2-2 million yuan.

In particular, type A and B products are mainly made of plastic materials, with wide sources of materials, low cost, simple structure, easy manufacturing, strong practicability, and large application market.

The above investment costs 30% and can obtain more than 60% profit.

The above is the sales volume assessed by a province. If this product is officially put into production and reaches a large scale, the sales volume in the national stationery, teaching aids, and tool market should be several times the above assessment. The supply exceeds the demand, and the output value should exceed 1,000. Ten thousand yuan.

Conditions for production: Enterprises with casting molding technology and facilities, preferably with certain financial strength, such as large, medium and small stationery factories, measuring tool factories, etc.

Transfer method and conditions: The national exclusive patent technology transfer fee is 880,000 yuan, and the period is nine years, ending on March 31, 2012. The province can exclusively transfer 220,000 yuan, and can also participate in part of the shares.