A vehicle trim panel is secured to a vehicle structural panel by providing a vehicle trim fastener having spaced arms which embrace and overlie the legs on a mount which is seated over the edge of a vehicle structural panel. The canister resides within the chamber and connects at an outlet with the vacuum pump at an inlet with a porous wound pad. Examples of novel water-soluble strontium salts are e. Also, a transducer with components that rotate relative to each other.