For students in school, the lowest cost of applying for an invention patent may be 560 yuan. If the local government has subsidies, you can even out the position. It depends on the policy of the local intellectual property office, which varies from place to place and is related to the local fiscal revenue level.

There is a misprint in your speech. You can't apply for an invention patent for the theme you proposed, and it's meaningless to apply for a utility model patent and an appearance patent. Only after further improvement can it be possible to apply for a patent for invention. For primary and secondary school students, it is important to focus on their studies. Scores are the lifeblood of students! ! ! !

You can apply for industry standards and national standards for your topic, which needs to be discussed with the local technical supervision department. I have stated it in the Google creative proposal that ended on June 20, 2008.

It takes a lot of time and money to make hardware. Without decades of continuous experience, financial support, production practice verification and business practice suggestions, very few people can come out. One is the high elimination rate, and the other is the lack of funds and time support. More importantly, many people don't know where they are wrong at the end of their lives. What's wrong with it I have no idea what the best way is under the constraints of historical conditions and environment at that time.

Science and technology are still excellent, and being admitted to the top of the college entrance examination is affordable and convincing! ! ! Employment is the overriding primary task and the foundation of human survival! ! !

The following is my original;

Manufacturing technology of bicycle aluminum alloy rim

Don't lose money.

How can you grab food when others are living well?

The market is too small.

First of all, aluminum profiles should be extruded, processed in batches and opened. China's aluminum performance is poor, so it can't be a high-end racing car or a big plane. This 500 thousand is not enough for the first batch of goods

Cut the profile, then roll it into a circle with several wheels and weld it with carbon dioxide gas protection.

Drill spoke holes. Don't lose money.

There are imported aluminum materials and production lines, which cost tens of millions. Domestic equipment belongs to special equipment, so you can do it yourself. If you entrust someone else to design and manufacture, you will definitely lose your life.

What is the brand, model and price of the lightest electric moped, and what stores sell it?

It is produced in Beijing, Beijing Shenzhou Judian New Energy Technology Co., Ltd., mainly producing power lithium batteries, with one of the smallest bicycles, ultra-light weight and aluminum alloy body.

The price is 3,000 yuan, and the battery accounts for 1500 yuan. The battery is in the middle of the bicycle bar and inside the bar. You can run 15km on a single charge, which is about 10 ampere-hour capacity, 24 volts. The front wheel drive is adopted, and the motor is installed on the front fork. The plastic rim on the front wheel has internal teeth, which are consistent with the gears on the motor.

Shenzhen ZOOM Ruim, Shenzhen Xinlong Health Industry Development Co., Ltd. (No.Longfa Road 1 1, Longhua Sub-district Office, Bao 'an District, Shenzhen, Store: No.35 Wenxin 1st Road, Nanhai Avenue, Nanshan District, Shenzhen, 0755-8313/KLOC-0. Moped and electric vehicle are different in design, structure, technology, engineering difficulty and safety, so they cannot be confused. Here are their differences.

Where can I find a Japanese Yamaha electric bicycle monopoly in Qingdao (telephone number)

At present, most of them are smuggled, and the price in 500 yuan is about 1000 RMB. This kind of car is different from domestic electric cars, and it is power-assisted. If you don't ride a bike, its motor won't turn, and the riding torque is directly proportional to the driving current of the motor. When your riding torque exceeds a predetermined threshold, the driving current of the motor will linearly decrease. When your riding speed exceeds 16 km/h, the driving current of the motor will decrease linearly. When the bicycle speed exceeds 24 km/h, the driving current of the motor will drop to zero. If the wheel is stuck, you should apply a torque to the pedal of the bicycle for electric maneuver. If the car still doesn't move, cut off the input current of the motor, turn off the switch and restart it. The overall structure of this torque sensor is very reasonable, and it can transmit the torque of rotating transmission parts to a fixed angular displacement sensor, which shows that it has a solid industrial foundation in the material, design and processing of mechanical structure. Similarly, the internal transmission of bicycles was successfully copied in China 40 years ago, and was officially installed on commercial bicycles for sale. Due to the limitation of materials and processing conditions, this reverse engineering technology from physical mapping can never last long. Japanese law stipulates that bicycles should have headlights. Generally, generators driven by friction front wheels are used, and a few of them are drum generators with front wheels, rotating external permanent magnet tiles and fixed internal permanent magnets. A structure similar to the motor pulse tachometer generator in industrial control is adopted, and the generator coil is clamped by soft iron with thorns on both sides. Bicycle generators in the history of China were single-stage structures with external lines. Most mopeds in Japan are three-speed internal transmissions, usually with a central motor, a reduction gear and an overrunning clutch. Most smuggled Japanese moped batteries have reached the cycle life of charge and discharge, and there are original110v chargers. Generally speaking, Suzuki cars have the largest power.

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