What four-word words can barrel group produce?

Words or idioms that cannot form a four-character case.

Tube group words: tube socks, roller, horn, air pump, pantyhose, flashlight, tube label.

Pinyin tüng

1, thick bamboo tube.

2. Thick, empty and tall objects.

3. Cylindrical part of clothes, etc.

Extended data Chinese character strokes:

Related words:

1. Microphone?

Transmitter.

2. Pen container?

Pen holder made of ceramics, bamboo, etc.

3. measuring cylinder?

An instrument for measuring the volume of liquid, which is in the shape of a straight cylinder and made of glass with scales on it.

4. flashlight?

flashlight

5. Email [yóu tǒng]?

Mailbox.

6. syringe?

Needle.