Đoán phát minh: 1) This machine has a needle that is driven by an electric motor or by movements of your hand and foot. Clothes can be made with the of this machine. 2) This device can be used so that words spoken into a microphone or sound from a radio can be heard

1. This machine has a needle that is driven by an electric motor or by movements of your hand and foot. Clothes can be made with the of this machine
2. This device can be used so that words spoken into a microphone or sound from a radio can be heard
3. You can send a document to a distant place using this small machine
4. It is a continuous moving belt used for transporting products in a factory