1. Lateral earth pressures produced by saturated clays with negative pore-water pressures and unsaturated expansive clays with positive matric suctions are considered from a theoretical standpoint.

2. It suctions to the surface and allows caregivers to attach baby's favorite toys to the mat! When baby drops or throws things, they stay within arm's reach and off the floor! Keep baby germ free with the Busy …

3. The invention relates to an extractor hood (2) comprising a housing and a radial fan (6) which is arranged therein and which suctions an air flow through a suction opening, accelerates and expels through openings between the air blades (12) in a circular air guiding channel (16) surrounding the radial fan (6).