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Speakers are also called "horns". It is a very commonly used electro-acoustic transducer, which can be seen in sound-producing electronic and electrical equipment. A speaker is a transducer device that converts electrical signals into acoustic signals. The performance of the speaker has a great influence on the sound quality. The speaker is the weakest component in the audio equipment, and it is the most important component for the sound effect. There are many types of speakers, and they vary widely in price. Audio electrical energy produces sound through electromagnetic, piezoelectric or electrostatic effects that cause its cone or diaphragm to vibrate and resonate (resonate) with the surrounding air.

Packaging requirements: the whole or whole bundle of articles that are not afraid of collision and pressure resistance、 and those with rough edges、 sharp edges、 barbs or protruding teeth、 seaming、 and the possibility of damaging mail bags or other mail items、 such as thick iron barrels、 bearings、 steel cables、 etc.、 shall be boxed、 wrapped with thick cloth and fastened with ropes、 or fastened with iron sheets; All edges and corners are smooth、 the surface is flat、 and the mail bag tube will not be damaged. Rope cloth can be used to fasten or wind firmly. Valuables、 such as watches、 pocket watches、 cameras、 gold and silver ornaments、 jewelry、 precious medicinal materials、 etc.、 should be packed in strong and pressure resistant paper or metal boxes or wooden boxes、 and the space in the boxes should be properly filled with soft materials、 and the boxes should be wrapped with tough paper、 or wrapped with cloth.

The international logistics special line refers to the route channels to specific countries、 such as the British special line、 the American special line and the German special line.

International express delivery refers to the express delivery and logistics business conducted between two or more countries (or regions). The transportation of letters、 commercial documents and articles between countries (or regions) is a means of inspection and release of express mail through border ports between countries and customs. After the international express arrives at the destination country、 it needs to be transshipped again in the destination country to deliver the express to the final destination、 which is called international express.

The transportation modes of international logistics special line include air transportation、 sea transportation、 rail transportation、 land transportation、 etc. The modes of transportation of international express include air transportation、 sea transportation、 rail transportation、 etc.

International logistics focuses on the delivery of large quantities of goods to the destination and reduces costs by means of large-scale transportation; The overall price is lower than that of commercial express; Speed and timeliness are better than postal packets; Low packet loss rate. The timeliness of international express is very strong; High security of goods; Strong customs clearance capability; A wide range of goods can be collected.

International moving expenses by sea include the following aspects:?

1. In order to avoid serious damage of goods during transportation、 and to meet the customs clearance requirements、 furniture and other items during transportation、 the professional packaging team needs to carry out customized packaging、 including cardboard、 carton、 pearl wool、 bubble film、 winding film、 wrapping angle、 tape and other materials、 as well as the corresponding packaging and handling labor costs、 which are included in the cost.

2. After the articles are packed、 the packing team of the moving company will transport the packed furniture、 electrical appliances and other personal articles to the local warehouse or the nearest designated warehouse in the port city. The inland transportation costs are also included.

3. Before shipment、 the goods must go through the customs declaration formalities and be inspected by the customs before they can get on board. During this period、 there will be a series of related expenses. If the articles need to be fumigated according to the requirements of the destination country、 there will also be related expenses of fumigation.

4. The cargo at the port of departure will incur relevant port handling、 document and other miscellaneous charges、 and the shipping company will charge corresponding ocean freight during the transportation.

5. The cargo arriving at the port of destination will also incur the corresponding port miscellaneous charges.

6. After the goods arrive at the port of destination、 we will carry out the corresponding customs clearance、 that is、 we can make declaration to the customs of the destination country、 and we can arrange further work after the permission of the customs of the destination country. The performance of customs clearance procedures will also incur corresponding expenses.

7. After the customs clearance、 we will provide you with follow-up delivery services、 which are slightly different according to the requirements of each guest、 basically including placing all furniture in the designated room、 removing the outer packaging、 simply assembling furniture、 and finally removing all the disassembled packaging fragments before leaving.

International moving expenses mainly include departure cost、 sea freight and destination cost. Departure expenses include door-to-door packaging expenses、 domestic transportation expenses within the city、 customs clearance fees、 port miscellaneous expenses (possible fumigation、 inspection and other expenses at the port)、 ocean freight and ocean freight. The destination fee includes customs clearance fee、 port fee、 door-to-door delivery and unpacking arrangement fee.