What is a Protractor?

Drawing tools, common materials are plastic or iron, you can draw the desired angle according to your needs. Often used with compasses.

[liáng jio qì]

Can draw

Protractor manufacturing materials have a wide range of sources, low cost, simple structure, easy manufacturing, and strong practicability.

1.3 billion people in the country, taking a province with a middle population as an example, 40 million people, based on 20% of primary and secondary school students, at least 8 million students, and then 5% of the purchase amount

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

Ways and conditions of transfer

The national exclusive patent technology transfer fee is 880,000 yuan, with a period of nine years, ending March 31, 2012. The province has an exclusive transfer of 220,000 yuan, and can also partly participate in shares.