A virtualized storage system comprises at least one host, at least one virtual array, a backend array and a management server. The vehicle is supported from the underlying surface by wheels, caterpillar tracks, or an air cushion, and includes navigational equipment which controls the vehicle so that it positions itself under the animals’ teats whereupon the teat cups automatically placed on the relevant animals’ teats one by one or in pairs. The invention further relates to methods for producing a lettuce plant containing in its genetic material one or more transgenes and to the transgenic lettuce plants and plant parts produced by those methods. The computer executes the test command. The fluorinated water-repellent layer alone has a thickness of 1 nm to 4 nm.