Principle of circulating water vacuum pumpThe principle of circulating water is different from that of vacuum pu...

1) The production of temperature and humidity environment test equipment has lasted for decades in the machinery...

1) The production of temperature and humidity environment test equipment has lasted for decades in the machinery...

The invention discloses a constant temperature water bath pot, which comprises an outer shell with an opening at...

The utility model discloses a water circulating vacuum pump, which comprises a water tank, a driving motor arran...