Then he heard it. A soft, wet clicking from the air duct above his mop sink. Then a whisper— his whisper—echoing back in a broken, childlike pitch:
The GFS-3000 allows for total control over the physiological environment of the sample: GFS-3000 - WALZ gfs-3000 manual
The following content is derived from the official documentation provided by Heinz Walz GmbH : Then he heard it