| 摘要 |
When the button 2 is pressed counter to the action of the spring 12, the plunger 5 forces the air out of the space 10 and tube 9. If the free end of the tube is placed on a small part (precious stone 8) and the button 2 released, the spring 12 forces button 2 and plunger 5 to the left. The air around space 10 and tube 9 is rarified. The external air pressure holds the stone 8 on the tube 9. <IMAGE>
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