Cohesion Force Demonstration(Educational equipment):
1) This product is a utility model, is the cohesion demonstration in the physics teaching demonstration molecular attraction of the instrument, the lead tube (or lead tube), scraping, extrusion etc.
2) Use this device can ensure the smooth surface lead body, clean easily scraping off, "mark" to lead the stationing uniform center axis symmetric, extrusion suspension easily.
3) This instrument hanging heavy 40 kg, the highest rate of 95% above, and can realize many consecutive scraping off.
4) Use this instrument can be difficult to succeed in the demonstration experiment teachers for the student to begin to develop the students' experiment.
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