| 摘要 |
<p>The apparatus has vacuum space formed at the end of the cylinder. A piston is connected to crankshaft by a connecting rod. Both the ball bearings are provided outside the vacuum chamber. Both cylinder and vacuum chamber are screwed together and sealed. An atmosphere device is powered by two cylinders. The vacuum pump and the power generator without the drive motor are coupled one behind the other by belt pulley. A rating plate of device is provided containing question mark which indicates size of vacuum pump, so that year of manufacture of vacuum pump is determined after delivery.</p> |
