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Induction cooker is also known as electromagnetic cooker. In 1957, the first household induction cooker was born in Germany. In 1972, the United States began to produce induction cookers. In the early 1980s, induction cookers began to sell well in Europe, America and Japan. The principle of the induction cooker is electromagnetic induction phenomenon, that is, the alternating current is used to generate an alternating magnetic field with changing direction through the coil. Vortex current will appear inside the conductor in the alternating magnetic field (the reason can be referred to Faraday's electromagnetic induction law), which is caused by the movement of carriers in the conductor (electrons rather than iron atoms in the pot) driven by the eddy electric field; The Joule thermal effect of vortex current makes the conductor temperature rise, thus heating is realized.

characteristic:

1. Shipping is the main mode of international trade transportation. Due to the unique global geographical conditions and the rise of containers、 shipping has become the focus of international trade.

2. Maritime transport can save foreign exchange expenditure and increase foreign exchange income. Generally、 countries with developed maritime transport will actively establish their own fleets and focus on overseas cargo transport. And foreign exchange income has also become an important pillar of these countries.

3. Maritime transport is conducive to improving the country's industrial structure. Maritime transport is mainly realized by maritime activities、 which can not be separated from ship manufacturing、 navigation technology、 seafarer training、 etc.、 and can help promote the development of industry、 manufacturing、 electronic technology、 waiter、 and improve the national industrial structure.

01 Large goods are easily damaged during transportation. Due to the characteristics of large goods such as large volume、 high quality and high value、 it is particularly important to ensure the integrity of the goods during transportation. However、 some overseas warehouses will ignore this. For example、 some overseas warehouses will not provide waterproof packaging for the goods、 adopt professional packaging techniques、 and create protective clothing、 which will cause damage to large goods during transportation due to improper packaging protection.

02 Large capital investment and cost estimation. The purchase cost of medium and large parts is much higher than that of small parts、 which has certain requirements for the seller's capital、 selection、 logistics and other capabilities.

03 In terms of logistics、 overseas warehouses are required、 and the logistics cost accounts for more than 30% of the turnover. Due to product weight、 volume and other reasons、 most large products are shipped to overseas warehouses by sea. After platform orders are generated、 they are directly delivered to consumers from overseas warehouses. The logistics cost of large products usually accounts for about 30% of the turnover、 which is reflected in the following aspects: the length of goods exceeds the standard、 extra long surcharges、 overweight products include overweight charges、 product packaging is too large、 and the size does not meet the standard、 which may lead to uncontrolled logistics costs.

Shipping is only one of the first trips of FBA. FBA shipping is divided into ordinary ships (slow ships) and fast ships、 which are different in speed and efficiency. As the name implies、 ordinary ships need to be slower、 and fast ships need to be faster. Taking MATSON and ZIM as examples、 you can reach the ports of Western America in about 13 days by sea. If you want a good time limit、 you can choose express. The whole time limit is about 22-30 days.